Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-11 Thread Tim
On Wed, Feb 11, 2009 at 10:33 AM, Steven Sim wrote: > Tim; > > The proper procedure for ejecting a USB drive in Windows is to right click > the device icon and eject the appropriate listed device. > I'm well aware of what the proper procedure is. My point is, I've done it for years without for

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-11 Thread D. Eckert
(...) Good. It looks like this thread can finally die. I received the following in response to my message below: (...) I apologize that your eMail could not be delivered. This is to either the mail server you use is considered as a machine from a dynamic ip pool or your mail server is anywhere o

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-11 Thread Steven Sim
Tim; The proper procedure for ejecting a USB drive in Windows is to right click the device icon and eject the appropriate listed device. I've done this before without ejecting and lost data before. My personal experience with ZFS is that it is very reliable FS. I've not lost data on it yet e

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-11 Thread Tim
On Tue, Feb 10, 2009 at 11:44 PM, Fredrich Maney wrote: > > Ah... an illiterate AND idiotic bigot. Have you even read the manual > or *ANY* of the replies to your posts? *YOU* caused the situation that > resulted in your data being corrupted. Not Sun, not OpenSolaris, not > ZFS and not anyone on t

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-11 Thread Toby Thain
On 11-Feb-09, at 10:08 AM, David Dyer-Bennet wrote: On Tue, February 10, 2009 23:43, Uwe Dippel wrote: 1. Can the relevant people confirm that drives might turn dead when leaving a pool at unfortunate moments? Despite of complete physical integrity? [I'd really appreciate an answer here, bec

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-11 Thread David Dyer-Bennet
On Tue, February 10, 2009 23:43, Uwe Dippel wrote: > 1. Can the relevant people confirm that drives might turn dead when > leaving a pool at unfortunate moments? Despite of complete physical > integrity? [I'd really appreciate an answer here, because this is what I > am starting to implement here

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-11 Thread dick hoogendijk
On Tue, 10 Feb 2009 21:43:00 PST Uwe Dippel wrote: > Back to where I started from, with some questions: > 1. Can the relevant people confirm that drives might turn dead when > leaving a pool at unfortunate moments? Despite of complete physical > integrity? I have not experienced this. I -DID- ex

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-11 Thread Kyle McDonald
On 2/10/2009 4:48 PM, Roman V. Shaposhnik wrote: On Wed, 2009-02-11 at 09:49 +1300, Ian Collins wrote: These posts do sound like someone who is blaming their parents after breaking a new toy before reading the instructions. It looks like there's a serious denial of the fact that "bad

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-11 Thread Kyle McDonald
On 2/10/2009 3:37 PM, D. Eckert wrote: (...) Possibly so. But if you had that ufs/reiserfs on a LVM or on a RAID0 spanning removable drives, you probably wouldn't have been so lucky. (...) we are not talking about a RAID 5 array or an LVM. We are talking about a single FS setup as a zpool over

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-11 Thread Gino
> > > This is CR 6667683 > > > > http://bugs.opensolaris.org/view_bug.do?bug_id=6667683 > > > > I think that would solve 99% of ZFS corruption > problems! > > Based on the reports I've seen to date, I think > you're right. > > > Is there any EDT for this patch? > > Well, because of this thread,

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-11 Thread Uwe Dippel
[Still waiting for answers on my earlier questions] So I take it that ZFS solves one problem perfectly well: Integrity of data blocks. It uses CRC and atomic writes for this purpose, and as far as I could follow this list, nobody has ever had any problems in this respect. However, it also - at l

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-11 Thread Jeff Bonwick
> > This is CR 6667683 > > http://bugs.opensolaris.org/view_bug.do?bug_id=6667683 > > I think that would solve 99% of ZFS corruption problems! Based on the reports I've seen to date, I think you're right. > Is there any EDT for this patch? Well, because of this thread, this has gone from "on my

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-11 Thread Gino
> > "g" == Gino writes: > > g> we lost many zpools with multimillion$ EMC, > Netapp and > g> HDS arrays just simulating fc switches power > fails. > g> The problem is that ZFS can't properly > recover itself. > I don't like what you call ``the problem''---I think > it assumes too > much.

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-11 Thread Gino
> Mario Goebbels wrote: > >> The good news is that ZFS is getting popular > enough on consumer-grade > >> hardware. The bad news is that said hardware has > a different set of > >> failure modes, so it takes a bit of work to become > resilient to them. > >> This is pretty high on my short list. >

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-11 Thread Jeff Bonwick
> I'm rather tired of hearing this mantra. > [...] > Every file system needs a repair utility Hey, wait a minute -- that's a mantra too! I don't think there's actually any substantive disagreement here -- stating that one doesn't need a separate program called /usr/sbin/fsck is not the same as sa

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-11 Thread Greg Palmer
Uwe Dippel wrote: We have seen some unfortunate miscommunication here, and misinterpretation. This extends into differences of culture. One of the vocal person in here is surely not 'Anti-xyz'; rather I sense his intense desire to further the progress by pointing his finger to some potential w

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Anton B. Rang
> Fsck can only repair known faults; known > discrepancies in the meta data. > Since ZFS doesn't have such known discrepancies, > there's nothing to repair. I'm rather tired of hearing this mantra. If ZFS detects an error in part of its data structures, then there is clearly something to repair.

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Jan.Dreyer
In other words: Dont feed the troll. Greets Jan Dreyer zfs-discuss-boun...@opensolaris.org <> wrote : > Good. It looks like this thread can finally die. I received the > following in response to my message below: > > > > > This is an automatically generated Delivery Status Notification > >

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Fredrich Maney
Good. It looks like this thread can finally die. I received the following in response to my message below: This is an automatically generated Delivery Status Notification Delivery to the following recipient failed permanently: cont...@desystems.cc Technical details of permanent failure:

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Fredrich Maney
On Tue, Feb 10, 2009 at 4:14 PM, D. Eckert wrote: > I think you are not reading carefully enough, and I > can trace from your reply a typically American > arrogant behavior. > > WE, THE PROUDEST AND infallibles on earth DID NEVER MAKE > a mistake. It is just the stupid user who did not read the >

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Uwe Dippel
We have seen some unfortunate miscommunication here, and misinterpretation. This extends into differences of culture. One of the vocal person in here is surely not 'Anti-xyz'; rather I sense his intense desire to further the progress by pointing his finger to some potential wounds. May I repeat

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Frank Cusack
On February 10, 2009 1:14:57 PM -0800 "D. Eckert" wrote: I hope I've made myself very clear. Very. Rarely has the adage "what one says reveals more about the speaker than the subject" been more evident. And as more postings we have to read in the sound of yours as more we are thinking to

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread David Champion
DE: I think that a big part of the reason you're getting the responses you do is not arrogance from Sun or us kool-aid drinkers, but your own tone and attitude. You didn't ask for help in your initial message at all. The entire post was a diatribe against Sun and ZFS which was based on your exper

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Ian Collins
Roman V. Shaposhnik wrote: On Wed, 2009-02-11 at 09:49 +1300, Ian Collins wrote: These posts do sound like someone who is blaming their parents after breaking a new toy before reading the instructions. It looks like there's a serious denial of the fact that "bad things do happen to eve

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread dick hoogendijk
On Tue, 10 Feb 2009 13:14:57 PST "D. Eckert" wrote: > Hello? Did you already recognized the sound of the shot?? > I learned my lesson well, and in future this won't happen > again, because we will no longer use zfs, but we have a legal > interest, to get back our data we stored in trust on a non

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Richard Elling
Mario Goebbels wrote: The good news is that ZFS is getting popular enough on consumer-grade hardware. The bad news is that said hardware has a different set of failure modes, so it takes a bit of work to become resilient to them. This is pretty high on my short list. One thing I'd like to

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Miles Nordin
> "de" == D Eckert writes: de> from your reply a typically American arrogant behavior. de> WE, THE PROUDEST AND infallibles on earth DID NEVER MAKE a de> mistake. Maybe I should speak up since I defended you at the start. To my view: REASONABLE: * expect that ZFS lose al

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Roman V. Shaposhnik
On Wed, 2009-02-11 at 09:49 +1300, Ian Collins wrote: > These posts do sound like someone who is blaming their parents after > breaking a new toy before reading the instructions. It looks like there's a serious denial of the fact that "bad things do happen to even the best of people" on this thre

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread D. Eckert
if you are interested in my IP Address: no problem: 83.236.164.80 it just exactly approves my assumption, that's best and easier for someone - if he's in the right position - to adhere a big pavement on someone's mouth to avoid hearing a legal critique instead of discussing out the problem to f

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Marcelo H Majczak
I'll make a meta comment on the thread itself, not on the ZFS issue. There is more bashing and broad accusations than it would normally happen on a "professional usage" situation. Maybe a board admin can run a script on the ip addresses logged and find a more subtle meaning... I don't know, I'm

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Peter Schuller
> ps> This is a recommendation I would give even when you purchase > ps> non-cheap battery backed hardware RAID controllers (I won't > ps> mention any names or details to avoid bashing as I'm sure it's > ps> not specific to the particular vendor I had problems with most > ps> re

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread D. Eckert
I think you are not reading carefully enough, and I can trace from your reply a typically American arrogant behavior. WE, THE PROUDEST AND infallibles on earth DID NEVER MAKE a mistake. It is just the stupid user who did not read the fucking manual carefully enough. Hello? Did you already

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Nicolas Williams
On Tue, Feb 10, 2009 at 12:31:05PM -0800, D. Eckert wrote: > (...) > You don't move a pool with 'zfs umount', that only unmounts a single zfs > filesystem within a pool, but the pool is still active.. 'zpool export' > releases the pool from the OS, then 'zpool import' on the other machine. > (...)

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Charles Binford
DE - could you please post the output of your 'zpool umount usbhdd1' command? I believe the output will prove useful to the point being discussed below. Charles D. Eckert wrote: > (...) > You don't move a pool with 'zfs umount', that only unmounts a single zfs > filesystem within a pool, but the

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Mario Goebbels
> The good news is that ZFS is getting popular enough on consumer-grade > hardware. The bad news is that said hardware has a different set of > failure modes, so it takes a bit of work to become resilient to them. > This is pretty high on my short list. One thing I'd like to see is an _easy_ opti

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Toby Thain
On 10-Feb-09, at 1:05 PM, Peter Schuller wrote: YES! I recently discovered that VirtualBox apparently defaults to ignoring flushes, which would, if true, introduce a failure mode generally absent from real hardware (and eventually resulting in consistency problems quite unexpected to the user w

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Dave
D. Eckert wrote: (...) You don't move a pool with 'zfs umount', that only unmounts a single zfs filesystem within a pool, but the pool is still active.. 'zpool export' releases the pool from the OS, then 'zpool import' on the other machine. (...) with all respect: I never read such a non logic

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Ian Collins
D. Eckert wrote: (...) Possibly so. But if you had that ufs/reiserfs on a LVM or on a RAID0 spanning removable drives, you probably wouldn't have been so lucky. (...) we are not talking about a RAID 5 array or an LVM. We are talking about a single FS setup as a zpool over the entire available d

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread D. Eckert
(...) Possibly so. But if you had that ufs/reiserfs on a LVM or on a RAID0 spanning removable drives, you probably wouldn't have been so lucky. (...) we are not talking about a RAID 5 array or an LVM. We are talking about a single FS setup as a zpool over the entire available disk space on an ext

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread D. Eckert
(...) You don't move a pool with 'zfs umount', that only unmounts a single zfs filesystem within a pool, but the pool is still active.. 'zpool export' releases the pool from the OS, then 'zpool import' on the other machine. (...) with all respect: I never read such a non logic ridiculous . I have

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Miles Nordin
> "rs" == Roman Shaposhnik writes: rs>1. as a forensics tool that would let you retrieve as much rs> information as possible from a physically ill device a nit, but I've never foudn fsck alone useful for this. Maybe for ``a filesystem trashed by bad RAM/CPU/bugs'' it is usefu

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Tim
On Tue, Feb 10, 2009 at 12:46 PM, Miles Nordin wrote: > > It's likely other filesystems are affected by ``the problem'' as I > define it, just much less so. If that's the case, it'd be much better > IMHO to fix the real problem once and for all, and find it so that it > stays fixed, than to make

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Carsten Aulbert
Hi, i've followed this thread a bit and I think there are some correct points on any side of the discussion, but here I see a misconception (at least I think it is): D. Eckert schrieb: > (..) > Dave made a mistake pulling out the drives with out exporting them first. > For sure also UFS/XFS/EXT4/

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Kyle McDonald
On 2/10/2009 2:54 PM, D. Eckert wrote: I disagree, see posting above. ZFS just accepts it 2 or 3 times. after that, your data are passed away to nirvana for no reason. And it should be legal, to have an external USB drive with a ZFS. with all respect, why should a user always care for redunda

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Roman Shaposhnik
On Feb 9, 2009, at 7:06 PM, Jeff Bonwick wrote: >>There is no substitute for cord-yank tests - many and often. The >>weird part is, the ZFS design team simulated millions of them. >>So the full explanation remains to be uncovered? > >We simulated power failure; we did not simulate disks that simp

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread D. Eckert
(...) If anyone asks questions, they get no actual information, but a huge amount of blame heaped on the sysadmin. Your post is a great example of the typical way this problem is handled because it does both: deny information and blame the sysadmin. Though I'm really picking on you way too much her

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Kyle McDonald
On 2/10/2009 2:50 PM, D. Eckert wrote: (..) Dave made a mistake pulling out the drives with out exporting them first. For sure also UFS/XFS/EXT4/.. doesn't like that kind of operations but only with ZFS you risk to loose ALL your data. that's the point! (...) I did that many times after perform

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread D. Eckert
I disagree, see posting above. ZFS just accepts it 2 or 3 times. after that, your data are passed away to nirvana for no reason. And it should be legal, to have an external USB drive with a ZFS. with all respect, why should a user always care for redundancy, e. g. setup a mirror on a single HD

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread D. Eckert
(..) Dave made a mistake pulling out the drives with out exporting them first. For sure also UFS/XFS/EXT4/.. doesn't like that kind of operations but only with ZFS you risk to loose ALL your data. that's the point! (...) I did that many times after performing the umount cmd with ufs/reiserfs fil

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Miles Nordin
> "ps" == Peter Schuller writes: ps> This is a recommendation I would give even when you purchase ps> non-cheap battery backed hardware RAID controllers (I won't ps> mention any names or details to avoid bashing as I'm sure it's ps> not specific to the particular vendor I had

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Miles Nordin
> "g" == Gino writes: g> we lost many zpools with multimillion$ EMC, Netapp and g> HDS arrays just simulating fc switches power fails. g> The problem is that ZFS can't properly recover itself. I don't like what you call ``the problem''---I think it assumes too much. You m

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Miles Nordin
> "jb" == Jeff Bonwick writes: jb> We simulated power failure; we did not simulate disks that jb> simply blow off write ordering. Any disk that you'd ever jb> deploy in an enterprise or storage appliance context gets this jb> right. Did you simulate power failure of iSCSI/FC

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Toby Thain
On 10-Feb-09, at 1:03 PM, Charles Binford wrote: Jeff, what do you mean by "disks that simply blow off write ordering."? My experience is that most enterprise disks are some flavor of SCSI, and host SCSI drivers almost ALWAYS use simple queue tags, implying the target is free to re-order th

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Peter Schuller
> on a UFS ore reiserfs such errors could be corrected. In general, UFS has zero capability to actually fix real corruption in any reliable way. What you normally do with fsck is repairing *expected* inconsistencies that the file system was *designed* to produce in the event of e.g. a sudden rebo

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Peter Schuller
> And again: Why should a 2 weeks old Seagate HDD suddenly be damaged, if there > was no shock, hit or any other event like that? I have no information about your particular situation, but you have to remember the ZFS uncovers problems that otherwise go unnoticed. Just personally on my private ha

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Peter Schuller
> YES! I recently discovered that VirtualBox apparently defaults to > ignoring flushes, which would, if true, introduce a failure mode > generally absent from real hardware (and eventually resulting in > consistency problems quite unexpected to the user who carefully > configured her journa

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Charles Binford
Jeff, what do you mean by "disks that simply blow off write ordering."? My experience is that most enterprise disks are some flavor of SCSI, and host SCSI drivers almost ALWAYS use simple queue tags, implying the target is free to re-order the commands for performance. Are talking about something

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Peter Schuller
> >However, I just want to state a warning, that ZFS is far from being that > >what it > >is promising, and so far from my sum of experience I can't recommend at all > >to > >use zfs on a professional system. > > > Or, perhaps, you've given ZFS disks which are so broken that they are > really

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Ahmed Kamal
> > The good news is that ZFS is getting popular enough on consumer-grade > hardware. The bad news is that said hardware has a different set of > failure modes, so it takes a bit of work to become resilient to them. > This is pretty high on my short list. So does this basically mean zfs rolls-ba

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Mattias Pantzare
> What filesystem likes it when disks are pulled out from a LIVE > filesystem? Try that on UFS and you're f** up too. Pulling a disk from a live filesystem is the same as pulling the power from the computer. All modern filesystems can handle that just fine. UFS with logging on do not even need fsc

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Gino
> On Mon, 09 Feb 2009 01:46:01 PST > "D. Eckert" wrote: > > > after working for 1 month with ZFS on 2 external > USB drives I have > > experienced, that the all new zfs filesystem is the > most unreliable > > FS I have ever seen. > > > > Since working with the zfs, I have lost datas from: > > >

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread dick hoogendijk
On Mon, 09 Feb 2009 01:46:01 PST "D. Eckert" wrote: > after working for 1 month with ZFS on 2 external USB drives I have > experienced, that the all new zfs filesystem is the most unreliable > FS I have ever seen. > > Since working with the zfs, I have lost datas from: > > 1 80 GB external Driv

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Gino
> > There is no substitute for cord-yank tests - many > and often. The > > weird part is, the ZFS design team simulated > millions of them. > > So the full explanation remains to be uncovered? > > We simulated power failure; we did not simulate disks > that simply > blow off write ordering. Any

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread Jeff Bonwick
> There is no substitute for cord-yank tests - many and often. The > weird part is, the ZFS design team simulated millions of them. > So the full explanation remains to be uncovered? We simulated power failure; we did not simulate disks that simply blow off write ordering. Any disk that you'd e

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread Toby Thain
On 9-Feb-09, at 6:17 PM, Miles Nordin wrote: >> "ok" == Orvar Korvar writes: > > ok> You are not using ZFS correctly. > ok> You have misunderstood how it is used. If you dont follow the > ok> manual (which you havent) then any filesystem will cause > ok> problems and corrupti

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread Miles Nordin
> "ok" == Orvar Korvar writes: ok> You are not using ZFS correctly. ok> You have misunderstood how it is used. If you dont follow the ok> manual (which you havent) then any filesystem will cause ok> problems and corruption, even ZFS or ntfs or FAT32, etc. You ok> must use

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread Glenn Lagasse
* Orvar Korvar (knatte_fnatte_tja...@yahoo.com) wrote: > Seagate7, > > You are not using ZFS correctly. You have misunderstood how it is > used. If you dont follow the manual (which you havent) then any > filesystem will cause problems and corruption, even ZFS or ntfs or > FAT32, etc. You must use

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread Orvar Korvar
Seagate7, You are not using ZFS correctly. You have misunderstood how it is used. If you dont follow the manual (which you havent) then any filesystem will cause problems and corruption, even ZFS or ntfs or FAT32, etc. You must use ZFS correctly. Start by reading the manual. For ZFS to be able

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread Bob Friesenhahn
On Mon, 9 Feb 2009, D. Eckert wrote: > > A good practice would be to care first for a proper documentation. > There's nothing stated in the man pages, if USB zpools are used, > that the zfs mount/unmount is NOT recommended and zpool export > should be used instead. I have been using USB mirrore

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread Andrew Gabriel
Kyle McDonald wrote: > D. Eckert wrote: > >> too many words wasted, but not a single word, how to restore the data. >> >> I have read the man pages carefully. But again: there's nothing said, that >> on USB drives zfs umount pool is not allowed. >> >> > It is allowed. But it's not enoug

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread David Champion
> too many words wasted, but not a single word, how to restore the data. > > I have read the man pages carefully. But again: there's nothing said, > that on USB drives zfs umount pool is not allowed. You misunderstand. This particular point has nothing to do with USB; it's the same for any ZFS en

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread Kyle McDonald
D. Eckert wrote: > too many words wasted, but not a single word, how to restore the data. > > I have read the man pages carefully. But again: there's nothing said, that on > USB drives zfs umount pool is not allowed. > It is allowed. But it's not enough. You need to read both the 'zpool ' and

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread Uwe Dippel
Full of sympathy, I still feel you might as well relax a bit. It is the XkbVariant that starts X without any chance to return. But look at the many "boot stops after the third line", and from my side, the not working network settings, even without nwam. The worst part was a so-called engineer sta

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread Casper . Dik
>too many words wasted, but not a single word, how to restore the data. > >I have read the man pages carefully. But again: there's nothing said, that on >USB drives zfs umount pool is not allowed. You cannot unmount a pool. You can only unmount a filesystem. That the default name of the pool's

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread Christian Wolff
First: It sucks to loose data. That's very uncool...BUT I don't know how ZFS should be able to recover data with no mirror to copy from. If you have some kind of a RAID level you're easily able to recover your data. I saw that several times. Without any problems and even with nearly no performa

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread Kyle McDonald
Hi Dave, Having read through the whole thread, I think there are several things that could all be adding to your problems. At least some of which are not related to ZFS at all. You mentioned the ZFS docs not warning you about this, and yet I know the docs explictly tell you that: 1. While a ZF

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread D. Eckert
too many words wasted, but not a single word, how to restore the data. I have read the man pages carefully. But again: there's nothing said, that on USB drives zfs umount pool is not allowed. So how on earth should a simple user know that, if he knows that filesystems properly unmounted using t

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread Casper . Dik
>James, > >on a UFS ore reiserfs such errors could be corrected. That's not true. That depends on the nature of the error. I've seen quite a few problems on UFS with corrupted file contents; such filesystems always are "clean". Yet the filesystems are corrupted. And no tool can fix those files

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread Jürgen Keil
> bash-3.00# zfs mount usbhdd1 > cannot mount 'usbhdd1': E/A-Fehler > bash-3.00# Why is there an I/O error? Is there any information logged to /var/adm/messages when this I/O error is reported? E.g. timeout errors for the USB storage device? -- This message posted from opensolaris.org _

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread MC
> on a UFS ore reiserfs such errors could be corrected. I think some of these people are assuming your hard drive is broken. I'm not sure what you're assuming, but if the hard drive is broken, I don't think ANY file system can do anything about that. At best, if the disk was in a RAID 5 array,

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread D. Eckert
James, on a UFS ore reiserfs such errors could be corrected. It is grossly negligent to develop a file system without proper repairing tools. More and more becomes clear, that it just was a marketing slogan by Sun to state, that ZFS does not use any repairing tools due to healing itself. In th

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread James C. McPherson
On Mon, 09 Feb 2009 03:10:21 -0800 (PST) "D. Eckert" wrote: > ok, so far so good. > > but how can I get my pool up and running I can't help you with this bit > bash-3.00# zpool status -xv usbhdd1 > Pool: usbhdd1 > Status: ONLINE > Zustand: Auf mindestens einem Gerät ist ein Fehler

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread D. Eckert
ok, so far so good. but how can I get my pool up and running Following output: bash-3.00# zfs get all usbhdd1 NAME PROPERTY VALUE SOURCE usbhdd1 type filesystem- usbhdd1 creation Do Dez 25 23:36 2008 - usbhdd1 used 3

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread Casper . Dik
>Well, umount is not the "right" way to do it, so he'd be simulating a >power-loss/system-crash. That still doesn't explain why massive data loss >would occur ? I would understand the last txg being lost, but 90% according >to OP ?! On USB or? I think he was trying to properly unmount the USB d

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread Ahmed Kamal
> > "Unmount" is not sufficient. > Well, umount is not the "right" way to do it, so he'd be simulating a power-loss/system-crash. That still doesn't explain why massive data loss would occur ? I would understand the last txg being lost, but 90% according to OP ?! __

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread Casper . Dik
>However, the hardware used is: > >1 Sun Fire 280R Solaris 10 generic 10-08 latest updates >1 Lenovo T61 Notebook running Solaris 10 genric 10-08 latest updates >1 Sony VGN-NR38Z > >Harddrives in use: Trekstore 1 TB, Seagate momentus 7.200 rpm 2.5" 80 GB. (Is that the Trekstore with 2x500GB) >Th

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread Ian Collins
D. Eckert wrote: > Hi Caspar, > > thanks for you reply. > > I completely disagreed to your opinion, that is USB. And seems as well, that > I am not the only one having this opinion regarding ZFS. > > However, the hardware used is: > > 1 Sun Fire 280R Solaris 10 generic 10-08 latest updates > 1 Len

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread D. Eckert
Hi Caspar, thanks for you reply. I completely disagreed to your opinion, that is USB. And seems as well, that I am not the only one having this opinion regarding ZFS. However, the hardware used is: 1 Sun Fire 280R Solaris 10 generic 10-08 latest updates 1 Lenovo T61 Notebook running Solaris 10

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread Casper . Dik
>However, I just want to state a warning, that ZFS is far from being that what >it >is promising, and so far from my sum of experience I can't recommend at all to >use zfs on a professional system. Or, perhaps, you've given ZFS disks which are so broken that they are really unusable; it is US

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread Tomas Ögren
On 09 February, 2009 - D. Eckert sent me these 1,5K bytes: > Hi, > > after working for 1 month with ZFS on 2 external USB drives I have > experienced, that the all new zfs filesystem is the most unreliable FS I have > ever seen. > > Since working with the zfs, I have lost datas from: > > 1 80

[zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread D. Eckert
Hi, after working for 1 month with ZFS on 2 external USB drives I have experienced, that the all new zfs filesystem is the most unreliable FS I have ever seen. Since working with the zfs, I have lost datas from: 1 80 GB external Drive 1 1 Terrabyte external Drive It is a shame, that zfs has no

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