Hi, On Thu, Jun 10, 2010 at 10:58 PM, Ethan Baldridge <baldridge.ethan@xxxxxxxxx> wrote: > Does such a list exist? > > I've got a system that depends on the symlink in /dev/disk/by-id to > identify which of the external drives at our datacenter contains the > data that needs to be removed and shipped out after we export to the > drive. > > This worked fabulously during in-house testing, but now that the system > is in production we find that some Toshiba drives (at least) don't > report a serial number to the OS that looks anything like what is > printed on the outside of the drive itself. That complicates things. > > Is this dastardly behavior limited to Toshiba, or merely the specific > model in question, or is it a known widespread problem for drives from > any vendor (and is it at least guaranteed that certain models are safe)? For SCSI disks (e.g. data obtained via scsi_id), ID_SERIAL isn't really the page 0x80 serial number that is typically printed on the label of the hard disk. This commit has some more information http://git.kernel.org/?p=linux/hotplug/udev.git;a=commitdiff;h=4e9fdfccbdd16f0cfdb5c8fa8484a8ba0f2e69d3 and exports the serial number and WWN in ID_WWN and ID_SCSI_SERIAL. FWIW, I don't think we use ID_SCSI_SERIAL in any /dev/disk symlinks but we probably could. Any chance you could try seeing if ID_SCSI_SERIAL works for you? It's available since udev version 148 or later. Also, we do use ID_WWN for /dev/disk/by-id/wwn-0x* symlinks (and this is set for both SCSI (including e.g. SAS) through scsi_id and ATA through ata_id) - maybe you can use the by-id/wwn-* symlinks instead? David -- To unsubscribe from this list: send the line "unsubscribe linux-hotplug" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
