Richard Scobie wrote: > > I recall seeing some of this problem on the list a few days ago, but > I > can't remember what the subject was and was unable to find the thread. > > You are perhaps thinking of this: > > http://marc.info/?l=linux-scsi&m=120696978819085&w=2 Yes. > but it seems to be a different issue. Ok. > From the message you posted, it looks as though there may be a problem > with sda. It's working fine with /sys/block/sd[abc]/device/queue_depth = 1 (on boot up, as stated before, it's 64) I performed the same copy again with queue_depth=1 after the array rebuilt. It worked fine then. No errors. > Does smartctl -a -d ata /dev/sda show any obvious problems? smartctl doesn't work on sd[a-d] at all: # smartctl -a -d ata /dev/sdd smartctl version 5.38 [i686-pc-linux-gnu] Copyright (C) 2002-8 Bruce Allen Home page is http://smartmontools.sourceforge.net/ Smartctl: Device Read Identity Failed (not an ATA/ATAPI device) A mandatory SMART command failed: exiting. To continue, add one or more '-T permissive' options. # smartctl -a -d ata -T permissive /dev/sdd smartctl version 5.38 [i686-pc-linux-gnu] Copyright (C) 2002-8 Bruce Allen Home page is http://smartmontools.sourceforge.net/ Smartctl: Device Read Identity Failed (not an ATA/ATAPI device) === START OF INFORMATION SECTION === Device Model: [No Information Found] Serial Number: [No Information Found] Firmware Version: [No Information Found] Device is: Not in smartctl database [for details use: -P showall] ATA Version is: 1 ATA Standard is: Exact ATA specification draft version not indicated Local Time is: Sun Apr 6 21:02:45 2008 EDT SMART is only available in ATA Version 3 Revision 3 or greater. We will try to proceed in spite of this. SMART support is: Ambiguous - ATA IDENTIFY DEVICE words 82-83 don't show if SMART supported. Checking for SMART support by trying SMART ENABLE command. Error SMART Enable failed: Invalid argument SMART ENABLE failed - this establishes that this device lacks SMART functionality. A mandatory SMART command failed: exiting. To continue, add one or more '-T permissive' options. # -- Lab tests show that use of micro$oft causes cancer in lab animals Got Gas??? -- 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