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usao 03-06-2016 10:23 AM
rescan-scsi-bus.sh causes all filesystems to go read-only mode
 
Every time I run: rescan-scsi-bus.sh -r
all my filesystems drop into read-only mode, and I cannot issue any host-based commands. A cold reboot clears the issue until the next time the rescan-scsi-bus.sh command is run.

Does anyone know the cause/resolution of this issue?

smallpond 03-06-2016 10:38 AM
Check your system log for what error is causing the filesystem to go read-only. If you have mulipathing enabled some storage does not like reads going to the non-active path.

usao 03-06-2016 10:42 AM
Quote:
Originally Posted by smallpond (Post 5511159)
Check your system log for what error is causing the filesystem to go read-only. If you have mulipathing enabled some storage does not like reads going to the non-active path.
That's the point of the question. I don't see any "cause".
This is a VM, so no multipathing. Even if I don't present/depresent a lun from the VM, it still drops to read-only mode...

# grep root_lv /proc/mounts
/dev/mapper/root_vg-root_lv / ext4 ro,relatime,barrier=1,data=ordered 0 0

The log shows this:
Mar 6 09:40:43 ssrxprddb4dr kernel: ata2: soft resetting link
Mar 6 09:40:44 ssrxprddb4dr kernel: ata2.00: configured for UDMA/33
Mar 6 09:40:44 ssrxprddb4dr kernel: ata2: EH complete
Mar 6 09:40:44 ssrxprddb4dr kernel: ata2.00: disabled
Mar 6 09:40:44 ssrxprddb4dr kernel: ata2: soft resetting link
Mar 6 09:40:44 ssrxprddb4dr kernel: ata2.00: ATAPI: VMware Virtual IDE CDROM Drive, 00000001, max UDMA/33
Mar 6 09:40:44 ssrxprddb4dr kernel: ata2.00: configured for UDMA/33
Mar 6 09:40:44 ssrxprddb4dr kernel: ata2: EH complete
Mar 6 09:40:44 ssrxprddb4dr kernel: scsi 1:0:0:0: CD-ROM NECVMWar VMware IDE CDR10 1.00 PQ: 0 ANSI: 5
Mar 6 09:40:44 ssrxprddb4dr kernel: sr0: scsi3-mmc drive: 1x/1x writer dvd-ram cd/rw xa/form2 cdda tray
Mar 6 09:40:44 ssrxprddb4dr kernel: sr 1:0:0:0: Attached scsi generic sg0 type 5
Mar 6 09:40:45 ssrxprddb4dr kernel: scsi 2:0:0:0: Direct-Access VMware Virtual disk 1.0 PQ: 0 ANSI: 2
Mar 6 09:40:45 ssrxprddb4dr kernel: sd 2:0:0:0: Attached scsi generic sg1 type 0
Mar 6 09:40:45 ssrxprddb4dr kernel: sd 2:0:0:0: [sdd] 16777216 512-byte logical blocks: (8.58 GB/8.00 GiB)
Mar 6 09:40:45 ssrxprddb4dr kernel: sd 2:0:0:0: [sdd] Write Protect is off
Mar 6 09:40:45 ssrxprddb4dr kernel: sd 2:0:0:0: [sdd] Cache data unavailable
Mar 6 09:40:45 ssrxprddb4dr kernel: sd 2:0:0:0: [sdd] Assuming drive cache: write through
Mar 6 09:40:45 ssrxprddb4dr kernel: sd 2:0:0:0: [sdd] Cache data unavailable
Mar 6 09:40:45 ssrxprddb4dr kernel: sd 2:0:0:0: [sdd] Assuming drive cache: write through
Mar 6 09:40:45 ssrxprddb4dr kernel: sdd: sdd1 sdd2
Mar 6 09:40:45 ssrxprddb4dr kernel: sd 2:0:0:0: [sdd] Cache data unavailable
Mar 6 09:40:45 ssrxprddb4dr kernel: sd 2:0:0:0: [sdd] Assuming drive cache: write through
Mar 6 09:40:45 ssrxprddb4dr kernel: sd 2:0:0:0: [sdd] Attached SCSI disk
Mar 6 09:40:46 ssrxprddb4dr kernel: scsi 2:0:1:0: Direct-Access VMware Virtual disk 1.0 PQ: 0 ANSI: 2
Mar 6 09:40:46 ssrxprddb4dr kernel: sd 2:0:1:0: [sde] 2147483648 512-byte logical blocks: (1.09 TB/1.00 TiB)
Mar 6 09:40:46 ssrxprddb4dr kernel: sd 2:0:1:0: Attached scsi generic sg2 type 0
Mar 6 09:40:46 ssrxprddb4dr kernel: sd 2:0:1:0: [sde] Write Protect is off
Mar 6 09:40:46 ssrxprddb4dr kernel: sd 2:0:1:0: [sde] Cache data unavailable
Mar 6 09:40:46 ssrxprddb4dr kernel: sd 2:0:1:0: [sde] Assuming drive cache: write through
Mar 6 09:40:46 ssrxprddb4dr kernel: sd 2:0:1:0: [sde] Cache data unavailable
Mar 6 09:40:46 ssrxprddb4dr kernel: sd 2:0:1:0: [sde] Assuming drive cache: write through
Mar 6 09:40:46 ssrxprddb4dr kernel: sde: unknown partition table
Mar 6 09:40:46 ssrxprddb4dr kernel: sd 2:0:1:0: [sde] Cache data unavailable
Mar 6 09:40:46 ssrxprddb4dr kernel: sd 2:0:1:0: [sde] Assuming drive cache: write through
Mar 6 09:40:46 ssrxprddb4dr kernel: sd 2:0:1:0: [sde] Attached SCSI disk
Mar 6 09:40:46 ssrxprddb4dr kernel: scsi 2:0:2:0: Direct-Access VMware Virtual disk 1.0 PQ: 0 ANSI: 2
Mar 6 09:40:46 ssrxprddb4dr kernel: sd 2:0:2:0: Attached scsi generic sg3 type 0
Mar 6 09:40:46 ssrxprddb4dr kernel: sd 2:0:2:0: [sdf] 2147483648 512-byte logical blocks: (1.09 TB/1.00 TiB)
Mar 6 09:40:46 ssrxprddb4dr kernel: sd 2:0:2:0: [sdf] Write Protect is off
Mar 6 09:40:46 ssrxprddb4dr kernel: sd 2:0:2:0: [sdf] Cache data unavailable
Mar 6 09:40:46 ssrxprddb4dr kernel: sd 2:0:2:0: [sdf] Assuming drive cache: write through
Mar 6 09:40:46 ssrxprddb4dr kernel: sd 2:0:2:0: [sdf] Cache data unavailable
Mar 6 09:40:46 ssrxprddb4dr kernel: sd 2:0:2:0: [sdf] Assuming drive cache: write through
Mar 6 09:40:46 ssrxprddb4dr kernel: sdf: unknown partition table
Mar 6 09:40:46 ssrxprddb4dr kernel: sd 2:0:2:0: [sdf] Cache data unavailable
Mar 6 09:40:46 ssrxprddb4dr kernel: sd 2:0:2:0: [sdf] Assuming drive cache: write through
Mar 6 09:40:46 ssrxprddb4dr kernel: sd 2:0:2:0: [sdf] Attached SCSI disk


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