Hello lists, (a mail for the archives)
I've posted in the past about problems with these enclosures - increasing the delay seems to fix it, albeit temporarily. The further you go in using the disk in such an enclosure, the higher the udelay() had to be - atleast that's what I'm seeing here (I've got two of these now :/ ) One permanent fix is adding a powered USB-hub in between the drive enclosures and the computer. Since I've done that, I've no longer seen any of the problems (i've attached the 'fault' log). Weird but true, since the drives come with their own powersupply. Hope this helps anyone in the future running into the same problem. -- "To vacillate or not to vacillate, that is the question ... or is it?"
usb 4-3: new high speed USB device using ehci_hcd and address 8 scsi5 : SCSI emulation for USB Mass Storage devices usb-storage: device found at 8 usb-storage: waiting for device to settle before scanning Vendor: Maxtor 6 Model: Y080P0 Rev: 0811 Type: Direct-Access ANSI SCSI revision: 00 SCSI device sda: 160086528 512-byte hdwr sectors (81964 MB) sda: assuming drive cache: write through SCSI device sda: 160086528 512-byte hdwr sectors (81964 MB) sda: assuming drive cache: write through sda: sda1 Attached scsi disk sda at scsi5, channel 0, id 0, lun 0 Attached scsi generic sg0 at scsi5, channel 0, id 0, lun 0, type 0 usb-storage: device scan complete XFS mounting filesystem sda1 Ending clean XFS mount for filesystem: sda1 XFS mounting filesystem sda1 Ending clean XFS mount for filesystem: sda1 usb 4-3: USB disconnect, address 8 scsi: Device offlined - not ready after error recovery: host 5 channel 0 id 0 lun 0 SCSI error : <5 0 0 0> return code = 0x10000 end_request: I/O error, dev sda, sector 80067680 scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed scsi5 (0:0): rejecting I/O to device being removed SCSI error : <5 0 0 0> return code = 0x10000 end_request: I/O error, dev sda, sector 80067744 scsi5 (0:0): rejecting I/O to device being removed I/O error in filesystem ("sda1") meta-data dev sda1 block 0x4c5bc21 ("xlog_iodone") error 5 buf count 32768 xfs_force_shutdown(sda1,0x2) called from line 952 of file fs/xfs/xfs_log.c. Return address = 0xc020af08 Filesystem "sda1": Log I/O Error Detected. Shutting down filesystem: sda1 Please umount the filesystem, and rectify the problem(s) I/O error in filesystem ("sda1") meta-data dev sda1 block 0x4c5bca1 ("xlog_iodone") error 5 buf count 32768 xfs_force_shutdown(sda1,0x2) called from line 952 of file fs/xfs/xfs_log.c. Return address = 0xc020af08 I/O error in filesystem ("sda1") meta-data dev sda1 block 0x4c5bce1 ("xlog_iodone") error 5 buf count 32768 xfs_force_shutdown(sda1,0x2) called from line 952 of file fs/xfs/xfs_log.c. Return address = 0xc020af08 I/O error in filesystem ("sda1") meta-data dev sda1 block 0x4c5bd21 ("xlog_iodone") error 5 buf count 32768 xfs_force_shutdown(sda1,0x2) called from line 952 of file fs/xfs/xfs_log.c. Return address = 0xc020af08 I/O error in filesystem ("sda1") meta-data dev sda1 block 0x4c5bd61 ("xlog_iodone") error 5 buf count 32768 xfs_force_shutdown(sda1,0x2) called from line 952 of file fs/xfs/xfs_log.c. Return address = 0xc020af08 I/O error in filesystem ("sda1") meta-data dev sda1 block 0x4c5bda1 ("xlog_iodone") error 5 buf count 32768 xfs_force_shutdown(sda1,0x2) called from line 952 of file fs/xfs/xfs_log.c. Return address = 0xc020af08 I/O error in filesystem ("sda1") meta-data dev sda1 block 0x4c5bde1 ("xlog_iodone") error 5 buf count 32768 xfs_force_shutdown(sda1,0x2) called from line 952 of file fs/xfs/xfs_log.c. Return address = 0xc020af08 I/O error in filesystem ("sda1") meta-data dev sda1 block 0x4c5bc61 ("xlog_iodone") error 5 buf count 32768 xfs_force_shutdown(sda1,0x2) called from line 952 of file fs/xfs/xfs_log.c. Return address = 0xc020af08 I/O error in filesystem ("sda1") meta-data dev sda1 block 0x68f3968 ("xfs_trans_read_buf") error 5 buf count 8192 xfs_force_shutdown(sda1,0x2) called from line 717 of file fs/xfs/xfs_log.c. Return address = 0xc020aa34 xfs_force_shutdown(sda1,0x1) called from line 353 of file fs/xfs/xfs_rw.c. Return address = 0xc02278bd xfs_force_shutdown(sda1,0x1) called from line 353 of file fs/xfs/xfs_rw.c. Return address = 0xc02278bd