I've seemingly hit a problem trying the combination of xfs on lvm on raid10 (software)
I've currently got 2 disks running (hda/hdc) and I've added two more (hdi/hdk). The running disks are configured as 2g ext3 root raid1 (hda1/hdc1-md0), 1g swap raid1 (hda2/hdc2-md1) and the rest as LVM partitions (hda3/hdc3). The LVM contains /usr, /var, and three other mounts, only one that crossed into the /dev/hdc3 PV. I had one disk fail, hdc, and I've gotten the replacement. The raid1 partitions were simple, but of course, LVM doesn't like disk failures. I used dd_rescue to make a copy of hdc3, and that seems to work. I get some xfs errors, and xfs_repair fails, but I'll deal with corrupt files later. I added the two other disks (same size) and partitioned them the same except for the 3rd partition which I set to raid partitions. My intention was to build a raid10 array. I made hdi1 a spare for md0, and hdi2 a spare for md1. I made hdi3 and hdk3 a raid0 md2. I then made md4 out of md2 and missing (md3 will be hda3 and hdc3). All fine. /proc/mdstat looks good, md4 is in degraded mode. The next step was supposed to be make a fs on the lvm on raid10, copy what I can from the corrupt old lvm partition, and then reformat hda3/hdc3 as raid devices and raid 0 them (md3) and then add them into the raid1 (md4). First problem, I had to reset the md detection flag in lvm.conf (lvm2). I eventually was able to pvcreate, vgcreate, and lvcreate. When I went to mkfs.xfs the new logical volume, I ran into: raid0_make_request bug: can't convert block across chunks or bigger than 64k google reveals that error during kernel 2.5.x -> 2.6.x, back in 2003. It seems to have been a problem with xfs on top of software raid0. http://www.ussg.iu.edu/hypermail/linux/kernel/0310.2/0982.html and http://linux-xfs.sgi.com/projects/xfs/mail_archive/200202/msg00472.html and perhaps fixed here: http://marc.theaimsgroup.com/?l=linux-raid&m=106661294929434 I'm running a mostly sarge (2.4.27-k7) system. I tried different PE size args to vgcreate, the default 4m and 32m. I'm just not sure what to try next. I came across some links that suggested not using xfs, but I'd like to know if that is the only solution, or did I make some mistake. Thanks (most of this is from memory, so if exact logs/status/commands are needed, I can provide) -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
