[zfs-discuss] Recover data from detached ZFS mirror

2010-11-25 Thread maciej kaminski
I've detached disk from a mirrored zpool using zpool detach (not zpool 
split) command. Is it possible to recover data from that disk? If yes, how? 
(and how to make it bootable)
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Re: [zfs-discuss] panic[cpu0]/thread=ffffff0016e03c40: zfs: allocating allocated segment...

2010-11-25 Thread Karel Gardas
Hello Victor,

thanks a lot for your help. I'm just going to buy some new drives here to be 
able to backup this pool, but anyway, what do you suggest to do with such pool 
later? Complete destroy and reinstall? Or is it possible to run scrub on 
read-only pool to recover it? I see this bugreport: 
http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6616286 which is 
already closed so I'm wondering if this bug is still present but not loaded 
into your bug db? i.e. any silent corruption bug in ZFS makes me a little bit 
nervous...

Thanks!
Karel

 
 With Solaris 11 Express you can import your pool in
 readonly fashion like this:
 
 zpool import -o readonly=on poolname
 
 that way you should be able to backup all your
 important data.
 
 Victor
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[zfs-discuss] How to zfs send current stage of fs from read-only pool?

2010-11-25 Thread Karel Gardas
Hello,
I'm trying to recover from zfs pool crash described here: 
http://www.opensolaris.org/jive/thread.jspa?threadID=135675tstart=0 -- I've 
successfully used Victor's advice and now I do have my pool imported in 
read-only mode. I see the data on filesystems and would like to backup all of 
them using zfs send/zfs receive to another backup pool.
My problem is that `zfs send' supports sending only of snapshot and I cannot 
create any new snapshot on the read-only pool. Is there any workaround for 
this? Something for example like virtual @now snapshot would be great to have 
for those purposes IMHO...
Thanks for any idea!
Karel
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[zfs-discuss] OCZ RevoDrive ZFS support

2010-11-25 Thread Karel Gardas
Hello,
I'm curious if there is a support for OCZ RevoDrive SSD or any other SSD hooked 
directly on PCIe in Solaris. This RevoDrive looks particularly interesting for 
its low price and why to buy something SATA based when someone might have twice 
the speed on PCIe for the same money
Thanks,
Karel
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[zfs-discuss] Strange behavior of b151a and .zfs directory

2010-11-25 Thread Karel Gardas
Hello,
after upgrade to Sol11Express I've noticed kind of strange behavior of .zfs 
directory of any ZFS filesystem. Go into the .zfs directory and type `find . 
-type f' for the first time after you've mounted the file-system. It'll show 
nothing. Type it second time and you will get expected list of files from all 
the snapshots.
Is this expected or is it a bug? I don't remember seeing this on OS2009.06.
Thanks,
Karel
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Re: [zfs-discuss] OCZ RevoDrive ZFS support

2010-11-25 Thread Christopher George
 I'm curious if there is a support for OCZ RevoDrive SSD or any other
 SSD hooked directly on PCIe in Solaris.

The RevoDrive should not require a custom device driver as it is based on the 
Silicon Image 3124 PCI-X RAID controller connected to a Pericom PCI-X to 
PCIe bridge chip (PI7C9X130).  The required driver would be the si3124(7D), 
I noticed the man page states NCQ is not supported.  I found the following link 
detailing the status:

http://opensolaris.org/jive/thread.jspa?messageID=466436

It might make an interesting L2ARC device, as it is definitely low cost.  It's 
based on multiple SandForce 1200 controllers.  Important to note because the 
on-board volatile caches are not power protected, so not a good fit for the ZIL 
Accelerator.  But perfectly acceptable for the L2ARC as drive contents are not 
required to survive a power failure (at this time).

Our PCIe based SSD, the DDRdrive X1, does require a dedicated device 
driver and we exclusively target ZIL acceleration.  We support OpenSolaris 
(2009-06 through b134), OpenIndiana, and NexentaStor 3.0.

I am excited to announce we just completed validation and are now also 
supporting Solaris 11 Express!

Best regards,

Christopher George
Founder/CTO
www.ddrdrive.com
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