Re: [BUG] Raid1/5 over iSCSI trouble

2007-10-20 Thread BERTRAND Joël
Bill Davidsen wrote: BERTRAND Joël wrote: Sorry for this last mail. I have found another mistake, but I don't know if this bug comes from iscsi-target or raid5 itself. iSCSI target is disconnected because istd1 and md_d0_raid5 kernel threads use 100% of CPU each ! Tasks: 235 total,

Re: Time to deprecate old RAID formats?

2007-10-20 Thread Doug Ledford
On Sat, 2007-10-20 at 09:53 +0200, Iustin Pop wrote: Honestly, I don't see how a properly configured system would start looking at the physical device by mistake. I suppose it's possible, but I didn't have this issue. Mount by label support scans all devices in /proc/partitions looking for

Re: chunk size (was Re: Time to deprecate old RAID formats?)

2007-10-20 Thread Doug Ledford
On Sat, 2007-10-20 at 00:43 +0200, Michal Soltys wrote: Doug Ledford wrote: course, this comes at the expense of peak throughput on the device. Let's say you were building a mondo movie server, where you were streaming out digital movie files. In that case, you very well may care more

Re: Software RAID when it works and when it doesn't

2007-10-20 Thread Michael Tokarev
Justin Piszcz wrote: [] - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Justin, forgive me please, but can you learn to trim the original messages when

Re: Software RAID when it works and when it doesn't

2007-10-20 Thread Justin Piszcz
On Sat, 20 Oct 2007, Michael Tokarev wrote: There was an idea some years ago about having an additional layer on between a block device and whatever else is above it (filesystem or something else), that will just do bad block remapping. Maybe it was even implemented in LVM or IBM-proposed

Re: Time to deprecate old RAID formats?

2007-10-20 Thread Michael Tokarev
Doug Ledford wrote: [] 1.0, 1.1, and 1.2 are the same format, just in different positions on the disk. Of the three, the 1.1 format is the safest to use since it won't allow you to accidentally have some sort of metadata between the beginning of the disk and the raid superblock (such as an

Re: Time to deprecate old RAID formats?

2007-10-20 Thread John Stoffel
Michael == Michael Tokarev [EMAIL PROTECTED] writes: Michael Doug Ledford wrote: Michael [] 1.0, 1.1, and 1.2 are the same format, just in different positions on the disk. Of the three, the 1.1 format is the safest to use since it won't allow you to accidentally have some sort of metadata

Re: Time to deprecate old RAID formats?

2007-10-20 Thread Iustin Pop
On Sat, Oct 20, 2007 at 10:52:39AM -0400, John Stoffel wrote: Michael Well, I strongly, completely disagree. You described a Michael real-world situation, and that's unfortunate, BUT: for at Michael least raid1, there ARE cases, pretty valid ones, when one Michael NEEDS to mount the

Re: Time to deprecate old RAID formats?

2007-10-20 Thread Doug Ledford
On Sat, 2007-10-20 at 17:07 +0200, Iustin Pop wrote: On Sat, Oct 20, 2007 at 10:52:39AM -0400, John Stoffel wrote: Michael Well, I strongly, completely disagree. You described a Michael real-world situation, and that's unfortunate, BUT: for at Michael least raid1, there ARE cases, pretty

Re: Time to deprecate old RAID formats?

2007-10-20 Thread Michael Tokarev
John Stoffel wrote: Michael == Michael Tokarev [EMAIL PROTECTED] writes: [] Michael Well, I strongly, completely disagree. You described a Michael real-world situation, and that's unfortunate, BUT: for at Michael least raid1, there ARE cases, pretty valid ones, when one Michael NEEDS to

Re: slow raid5 performance

2007-10-20 Thread Peter Grandi
On Thu, 18 Oct 2007 16:45:20 -0700 (PDT), nefilim [EMAIL PROTECTED] said: [ ... ] 3 x 500GB WD RE2 hard drives AMD Athlon XP 2400 (2.0Ghz), 1GB RAM [ ... ] avg-cpu: %user %nice %system %iowait %steal %idle 1.010.00 55.56 40.400.003.03 [ ... ] which is

Re: Time to deprecate old RAID formats?

2007-10-20 Thread Michael Tokarev
Justin Piszcz wrote: On Fri, 19 Oct 2007, Doug Ledford wrote: On Fri, 2007-10-19 at 13:05 -0400, Justin Piszcz wrote: [] Got it, so for RAID1 it would make sense if LILO supported it (the later versions of the md superblock) Lilo doesn't know anything about the superblock format,

Re: Time to deprecate old RAID formats?

2007-10-20 Thread Doug Ledford
On Sat, 2007-10-20 at 22:38 +0400, Michael Tokarev wrote: Justin Piszcz wrote: On Fri, 19 Oct 2007, Doug Ledford wrote: On Fri, 2007-10-19 at 13:05 -0400, Justin Piszcz wrote: [] Got it, so for RAID1 it would make sense if LILO supported it (the later versions of the md superblock)