/dev/disk/by-id incomplete and unhelpful for SATA drives

[David Liontooth <liontooth@cogweb.net>]

I can see the ID of my SATA drive with

# scsi_id -g -p0x80 -x -s /block/sda
ID_VENDOR=ATA
ID_MODEL=ST3400832AS
ID_REVISION=3.03
ID_SERIAL=SATA_ST3400832AS_5NF14TVY
ID_TYPE=disk
ID_BUS=scsi

or with

# sdparm --page=sn /dev/sda
    /dev/sda: ATA       ST3400832AS       3.03
Unit serial number VPD page:
              5NF14TVY

On a Debian sid (amd64) with udev 0.076-6, however, I don't have a
/etc/scsi_id.config.
Can I give my drives mount points using only /etc/udev.rules?

Another possibility would be to use label, which shows correctly in tree:

# tree /dev/disk
/dev/disk
|-- by-id
|   |-- ata-Maxtor_7B250R0_B61NS9FH -> ../../hda
|   |-- ata-Maxtor_7B250R0_B61NS9FH-part1 -> ../../hda1
|   |-- ata-Maxtor_7B250R0_B61NS9FH-part2 -> ../../hda2
|   |-- ata-Maxtor_7B250R0_B61NS9FH-part3 -> ../../hda3
|   |-- ata-Maxtor_7B250R0_B61NS9FH-part4 -> ../../hda4
|   |-- ata-Maxtor_7B250R0_B61NS9FH-part5 -> ../../hda5
|   |-- ata-Maxtor_7B250R0_B61NS9FH-part6 -> ../../hda6
|   |-- ata-Maxtor_7B250R0_B61NS9FH-part7 -> ../../hda7
|   |-- ata-Maxtor_7B250R0_B61NS9FH-part8 -> ../../hda8
|   |-- scsi-0ATA_ST3400832AS_Linux_ATA-SCSI_simulator -> ../../sda
|   `-- scsi-0ATA_ST3400832AS_Linux_ATA-SCSI_simulator-part1 -> ../../sda1
|-- by-label
|   |-- bc5 -> ../../sda1
|   |-- bc6 -> ../../sdb1
|   `-- bcspare -> ../../hda8

I have drives with several different filesystems, but perhaps that makes
no difference? These three labels are all XFS.

The board has two SATA chips, sata_sil and sata_nv, and device nodes
vary depending on how many drives are present.  I remove drives as they
fill and put them in SATA-to-USB enclosures. Ideally I'd have them mount
to the same location also as external drives.

Dave




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