This is a real odd problem and my searching of the mailing lists and docs has not shed any light on it. I created 3 logical volumes (with lvm 1.0.1r2, r3 and r4) across 4 disks on a dual 300 MHz PII running 2.4.6 (same behavior under 2.4.9) and readhat 7.1. After this I noticed IO errors while reading some files and SCSI errors when accessing lvol2. The errors were similar to the following Sep 28 17:11:21 gar kernel: scsi0: ERROR on channel 0, id 11, lun 0, CDB: Read (10) 00 00 ba e1 97 00 00 80 00 Sep 28 17:11:21 gar kernel: Info fld=0xbae1e6, Current sd08:21: sense key Medium Error Sep 28 17:11:21 gar kernel: Additional sense indicates Unrecovered read error Sep 28 17:11:21 gar kernel: I/O error: dev 08:21, sector 12247456 lvol2 spanned two disks and all the errors were on only one of them. I naturally thought that the problem was a hardware problem with the disk. The only odd thing was that lvol1 which spanned the same two disks did not have any errors. The first thing I tried was an mke2fs with bad block checking on lvol2. It found several errors and when I copied the files back on new errors cropped up and more files were lost. The next thing I did was to move all the data off of that disk (pvmove) and then did a low level format on that disk. No errors were detected during the low lever format nor the verify I did after that. I then did a mke2fs with bad block checking on the disk without LVM. No errors. I then did a pvcreate and re-created lvol2 and then did a mke2fs with bad block checking. Once again the SCSI errors. Removing that drive from LVM and formatting yet again without LVM showed no errors. Moving lvol2 to a different physical volume results in the SCSI errors moving to that volume. I am now convinced that the problem is with LVM and not with the hardware. I still have two other logical volumes (lvol1 and lvol3) that are not having ANY problems at all. Does anyone have any suggestion on how to solve this one? Thanks. ----------------------------------------------------- Protect yourself from spam, use http://sneakemail.com
