blk_update_request I/O error, dev sde, sector 0
kernel: blk_update_request: I/O error, dev sde, sector 0
kernel: blk_update_request: I/O error, dev sdf, sector 0
kernel: blk_update_request: I/O error, dev sdd, sector 0
kernel: blk_update_request: I/O error, dev sdc, sector 0
Why this error occurred? Can we ignore this alert?
How can we resolve this?
Responses
Those look like disk I/O errors on disks. If the errors refer to regular disk devices (sd*), I would carefully check the health and connectivity to those disks. The first step would be to find out what kind of disks those are: a "lsscsi" or "lsblk" command output might be very helpful here.
If those are local SATA/SAS/SCSI disks, I would check the connectivity and health of those disks: verify that all cables are properly plugged in, and review the SMART diagnostics data (see: the smartctl command).
If those are something like multipathed FibreChannel or iSCSI disks, I would see if those disk devices all refer to a particular HBA. I would also verify HBA status, to see if e.g. one path of multipathed storage has failed or started to produce errors. (The "multipath -ll" command or a similar multipath status display command might be useful here.)
If the errors always refer to sector 0 of each disk, in a multipathed system it might be something as simple as multipathd repeatedly testing a path that's been found to be inaccessible. (Reading sector 0 is one of dm-multipath's path_checker methods.) Once the failing path is fixed, the errors should stop.
Please see article here: https://access.redhat.com/solutions/1191433 We also see this in RHEL 7
we are getting same exact errors but it is for shared disk presented to Oracle RAC ASM. Almost daily we are getting same error on sd*. Any feedback or possible solution would be helpful
I am seeing the same errors on oracle vm server 3.4 that has two vmrac vm's and shared asm disk. were you able to contact oracle support and figure it out?
[ 303.427403] ocfs2: Unaligned AIO/DIO on inode 5771535 on device md127 by loop2
[ 486.207047] blk_update_request: I/O error, dev nvme0n1, sector 5818241025
[ 486.207265] blk_update_request: I/O error, dev nvme1n1, sector 5818241025
[ 486.210562] lo_rw_aio_complete:454:ERROR:-5 received. Device loop2 MAJOR:7 MINOR:2
[ 486.210566] blk_update_request: I/O error, dev loop2, sector 17805313
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