First forgive me to change the mail subject to the above. The HBA driver is Fusion_MPT, the log file is filled up by the following lines: ---------------------------------------------------------------------------- Apr 7 19:15:29 tiger43 kernel: mptbase: ioc0: IOCStatus(0x0043): SCSI Device Not There Apr 7 19:15:29 tiger43 kernel: SCSI error : <1 0 1 0> return code = 0x10000 Apr 7 19:15:29 tiger43 kernel: end_request: I/O error, dev sdb, sector 13370730 Apr 7 19:15:30 tiger43 kernel: mptbase: ioc0: IOCStatus(0x0043): SCSI Device Not There Apr 7 19:15:30 tiger43 kernel: SCSI error : <1 0 1 0> return code = 0x10000 Apr 7 19:15:30 tiger43 kernel: end_request: I/O error, dev sdb, sector 13370730 Apr 7 19:15:30 tiger43 kernel: mptbase: ioc0: IOCStatus(0x0043): SCSI Device Not There Apr 7 19:15:30 tiger43 kernel: SCSI error : <1 0 1 0> return code = 0x10000 Apr 7 19:15:30 tiger43 kernel: end_request: I/O error, dev sdb, sector 13370730 Apr 7 19:15:30 tiger43 kernel: mptbase: ioc0: IOCStatus(0x0043): SCSI Device Not There Apr 7 19:15:30 tiger43 kernel: SCSI error : <1 0 1 0> return code = 0x10000 Apr 7 19:15:30 tiger43 kernel: end_request: I/O error, dev sdb, sector 13370730 ---------------------------------------------------------------------------- Then the system become very busy and can't respond to other applications timely. Thanks, Forrest -----Original Message----- From: James Bottomley [mailto:James.Bottomley@xxxxxxxxxxxx] Sent: Thursday, March 24, 2005 12:36 AM To: Zhao, Forrest Cc: SCSI Mailing List Subject: Re: Proposal to add a new sysfs attribute to SCSI device On Tue, 2005-03-22 at 11:05 +0800, Zhao, Forrest wrote: > Let me tell you the testing experience in our lab: > 1 we install kernel 2.6.11.2 on a Tiger4 platform, > 2 there're two SCSI disks, one is sda for root fs, the other is sdb for > /mnt > 3 execute "cp -r /usr/src/linux-2.6.11.2 /mnt" > 4 during the process of copying, we surprise-removed sdb > 5 then system become very busy and freezing, even the user can't login > into the system whether locally or remotely > 6 the error output on the screen demonstrates that SCSI mid-layer is > endless retrying the failed I/O requests Which HBA driver is this? As long as the HBA can recognise the device is missing, the retries should go very fast because it's simply a bounce between the eh thread and the driver. James - : 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
