https://bugzilla.kernel.org/show_bug.cgi?id=107371 Bug ID: 107371 Summary: I/O error when accessing disk in standby Product: SCSI Drivers Version: 2.5 Kernel Version: 4.1.2 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Other Assignee: scsi_drivers-other@xxxxxxxxxxxxxxxxxxxx Reporter: nikmind@xxxxxxx Regression: No I got a LSI 2308 SAS controller (using the mpt2sas driver) and are noticing odd I/O errors on my disk. Example: [398374.597662] sd 0:0:4:0: [sde] UNKNOWN(0x2003) Result: hostbyte=0x00 driverbyte=0x00 [398374.597665] sd 0:0:4:0: [sde] CDB: opcode=0x88 88 00 00 00 00 00 c0 52 c3 90 00 00 00 08 00 00 [398374.597667] blk_update_request: I/O error, dev sde, sector 3226649488 It happenes to all disks on the controller. I can't seem to notice any problems due to this, but something does not seem right about getting this error. I also checked the offending sectors and it's no problem reading them. So i started to investigate this problem and soon found that the problem occurs when the disk is in standby mode. Ie. when I try to access the disk when it is in standby mode. Somehow the system tries to access the disk without spinning it up first, and hence getting this error. I also checked the offending sectors and there is no problem reading them. I don't notice any problems due to this error, but I don't think this error should occur. It's very easy to replicate. 1. run "hdparm -y" on the disk to spin it down. 2. Access the disk in any way, like list a directory. 3. Getting this I/O error above, but this getting the dirlist as if nothing wen't wrong. -- You are receiving this mail because: You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
