On Wed, 04 Feb 2009 13:03:39 +0100, Frederik Kriewitz wrote: > On Wed, Feb 4, 2009 at 12:23 PM, Hendrik Boom <hend...@topoi.pooq.com> > wrote: >> How can I ensure that the same /dev's are always associated with the >> same physical drives? Or am I misunderstanding something here and has >> the problem become obsolete? > > Have a look at the /dev/disk/by-* directories. There you'll find several > symlinks to your disks which can be used instead of /dev/sdX.
Fun. Lost of symlinks. Can I use these to identify the drives to be used in RAID pairs or for LLVM? by path and by-id seem to work, but by-uuid is worrisome: by-path and by-id seems to get them all, including all their partitions. by-id seems even to list the SATA drive (and each of its partitions) twice. /dev/disk/by-id: total 0 lrwxrwxrwx 1 root root 9 2009-01-21 10:53 ata-ST3750640AS-5QD4R5CW -> ../../sdb lrwxrwxrwx 1 root root 10 2009-01-21 11:19 ata-ST3750640AS-5QD4R5CW-part1 -> ../../sdb1 lrwxrwxrwx 1 root root 9 2009-01-21 10:53 ata-ST3750640AS-5QD4Z81L -> ../../sda lrwxrwxrwx 1 root root 10 2009-01-21 10:53 ata-ST3750640AS-5QD4Z81L-part1 -> ../../sda1 lrwxrwxrwx 1 root root 9 2009-01-21 10:53 ata-WDC_WD2500JB-00GVC0_WD-WMAL73372696 -> ../../hda lrwxrwxrwx 1 root root 10 2009-01-21 10:53 ata-WDC_WD2500JB-00GVC0_WD-WMAL73372696-part1 -> ../../hda1 lrwxrwxrwx 1 root root 10 2009-01-21 10:53 ata-WDC_WD2500JB-00GVC0_WD-WMAL73372696-part2 -> ../../hda2 lrwxrwxrwx 1 root root 10 2009-01-21 10:53 ata-WDC_WD2500JB-00GVC0_WD-WMAL73372696-part3 -> ../../hda3 lrwxrwxrwx 1 root root 9 2009-01-21 10:53 scsi-SATA_ST3750640AS_5QD4R5CW -> ../../sdb lrwxrwxrwx 1 root root 10 2009-01-21 11:19 scsi-SATA_ST3750640AS_5QD4R5CW-part1 -> ../../sdb1 lrwxrwxrwx 1 root root 9 2009-01-21 10:53 scsi-SATA_ST3750640AS_5QD4Z81L -> ../../sda lrwxrwxrwx 1 root root 10 2009-01-21 10:53 scsi-SATA_ST3750640AS_5QD4Z81L-part1 -> ../../sda1 lrwxrwxrwx 1 root root 9 2009-02-04 06:41 usb-ST350064_1A_0 -> ../../sdc lrwxrwxrwx 1 root root 10 2009-02-04 06:41 usb-ST350064_1A_0-part1 -> ../../sdc1 /dev/disk/by-path: total 0 lrwxrwxrwx 1 root root 9 2009-02-04 06:41 pci-0000:00:0b.1-usb-0:2:1.0-scsi-0:0:0:0 -> ../../sdc lrwxrwxrwx 1 root root 10 2009-02-04 06:41 pci-0000:00:0b.1-usb-0:2:1.0-scsi-0:0:0:0-part1 -> ../../sdc1 lrwxrwxrwx 1 root root 9 2009-01-21 10:53 pci-0000:00:0d.0-ide-0:0 -> ../../hda lrwxrwxrwx 1 root root 10 2009-01-21 10:53 pci-0000:00:0d.0-ide-0:0-part1 -> ../../hda1 lrwxrwxrwx 1 root root 10 2009-01-21 10:53 pci-0000:00:0d.0-ide-0:0-part2 -> ../../hda2 lrwxrwxrwx 1 root root 10 2009-01-21 10:53 pci-0000:00:0d.0-ide-0:0-part3 -> ../../hda3 lrwxrwxrwx 1 root root 9 2009-01-21 10:53 pci-0000:00:0e.0-scsi-0:0:0:0 -> ../../sda lrwxrwxrwx 1 root root 10 2009-01-21 10:53 pci-0000:00:0e.0-scsi-0:0:0:0-part1 -> ../../sda1 lrwxrwxrwx 1 root root 9 2009-01-21 10:53 pci-0000:00:0e.0-scsi-1:0:0:0 -> ../../sdb lrwxrwxrwx 1 root root 10 2009-01-21 11:19 pci-0000:00:0e.0-scsi-1:0:0:0-part1 -> ../../sdb1 by-uuid seems to miss one of the SATA drives completely, although it does list one SATA drive, the IDE drive, and the plugged-in USB drive. And although the symbolic links point to partitions, it doesn't mention anything but the first partition on /dev/sda1. /dev/disk/by-uuid: total 0 lrwxrwxrwx 1 root root 10 2009-01-21 10:53 233b1187-918e-4d12a396-5ea2242912f4 -> ../../sda1 lrwxrwxrwx 1 root root 10 2009-01-21 10:53 ab38a373-751e-4aff-98ab-89cda2c54726 -> ../../hda1 lrwxrwxrwx 1 root root 10 2009-02-04 06:41 f7b4688d-ad49-4a6d-88ca-77c6865ff894 -> ../../sdc1 Nor does it list my llvm or RAID devices here. Presumably that's because they aren't real disks, and I should seek them elsewhere. But I'm wondering about the missing SATA drive by-uuid. Its first partition is mounted as /dev/sdb1, and I can read and write it. -- hendrik -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
