http://bugzilla.kernel.org/show_bug.cgi?id=12742 Summary: Spinning up disk is observed on standby paths until timeout, resulting in longer path restoration time. Product: SCSI Drivers Version: 2.5 KernelVersion: 2.6.27 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: high Priority: P1 Component: Other AssignedTo: scsi_drivers-other@xxxxxxxxxxxxxxxxxxxx ReportedBy: narayanan.rengarajan@xxxxxx Latest working kernel version: 2.6.27 Earliest failing kernel version: Distribution: suse Hardware Environment:x86_64 Software Environment:sd Problem Description: Steps to reproduce: 1. present a standby lun to the host 2. do a discovery from the host (scan the scsi bus) 3. Spinning of disks is observed in /var/log/messages Whenever a device goes offline and comes back, the new sd device takes longer time to get created. This is because of the spinning up of disk in sd_spinup_disk fuction as the standby paths would return device not ready with 0x04/0x0b asc/ascq. recommended patch : diff -pNaur /usr/src/linux/drivers/scsi/sd.c sd.c --- /usr/src/linux/drivers/scsi/sd.c 2009-02-09 22:24:56.000000000 +0530 +++ sd.c 2009-02-19 16:39:16.000000000 +0530 @@ -1181,8 +1181,8 @@ sd_spinup_disk(struct scsi_disk *sdkp) */ if (sense_valid && sshdr.sense_key == NOT_READY && - sshdr.asc == 4 && sshdr.ascq == 3) { - break; /* manual intervention required */ + sshdr.asc == 4 && (sshdr.ascq == 3 || sshdr.ascq == 0x0b || sshdr.ascq == 0x0c) ) { + break; /* manual intervention required || Standby || Unavailable */ /* * Issue command to spin up drive when not ready -- Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. -- 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
