Just adding my observations... On 10.04 (2.6.32-27 x86_64) with a JFS filesystem, an external Mediasonic 4-Bay enclose (JBOD) will crap out every few days with:
[421343.711477] usb 1-4.1: device descriptor read/8, error -110 [421348.840954] usb 1-4.1: device descriptor read/8, error -110 [421348.951083] sd 10:0:0:0: Device offlined - not ready after error recovery [421348.951095] sd 10:0:0:0: [sdg] Unhandled error code [421348.951097] sd 10:0:0:0: [sdg] Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK [421348.951101] sd 10:0:0:0: [sdg] CDB: Read(16): 88 00 00 00 00 01 2a 1e b9 48 00 00 00 80 00 00 [421348.951112] end_request: I/O error, dev sdg, sector 5001623880 [421348.951132] sd 10:0:0:0: rejecting I/O to offline device etc.. I've noticed that changing the max_sectors on the drive to 1024 makes it fail much more quickly. Unfortunately, it still fails with others I've tried (128, 256, 512), though with 128 it usually runs for a few days. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/349767 Title: external USB hard drive disconnects -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
