I'm not sure if there is a better way, but on Debian 5 "Squeeze" I look at the
contents of the directory /dev/disk/by-path/
ls -l /dev/disk/by-path/
total 0
lrwxrwxrwx 1 root root 10 2012-08-08 14:42 pci-0000:00:1f.2-scsi-0:0:0:0 ->
../../sdae
lrwxrwxrwx 1 root root 11 2012-08-08 14:42 pci-0000:00:1f.2-scsi-0:0:0:0-part1
-> ../../sdae1
lrwxrwxrwx 1 root root 11 2012-08-08 14:42 pci-0000:00:1f.2-scsi-0:0:0:0-part2
-> ../../sdae2
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:02:04.0-scsi-0:0:0:0 ->
../../sda
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:02:04.0-scsi-0:1:0:0 ->
../../sdb
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:02:04.0-scsi-0:2:0:0 ->
../../sdc
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:02:04.0-scsi-0:3:0:0 ->
../../sdd
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:02:04.0-scsi-0:4:0:0 ->
../../sde
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:02:04.0-scsi-3:0:0:0 ->
../../sdf
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:02:04.0-scsi-3:1:0:0 ->
../../sdg
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:02:04.0-scsi-3:2:0:0 ->
../../sdh
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:02:04.0-scsi-3:3:0:0 ->
../../sdi
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:02:04.0-scsi-3:4:0:0 ->
../../sdj
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:02:04.0-scsi-4:0:0:0 ->
../../sdk
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:02:04.0-scsi-4:1:0:0 ->
../../sdl
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:02:04.0-scsi-4:2:0:0 ->
../../sdm
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:02:04.0-scsi-4:3:0:0 ->
../../sdn
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:02:04.0-scsi-4:4:0:0 ->
../../sdo
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:04:04.0-scsi-0:0:0:0 ->
../../sdp
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:04:04.0-scsi-0:1:0:0 ->
../../sdq
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:04:04.0-scsi-0:2:0:0 ->
../../sdr
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:04:04.0-scsi-0:3:0:0 ->
../../sds
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:04:04.0-scsi-0:4:0:0 ->
../../sdt
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:04:04.0-scsi-2:0:0:0 ->
../../sdu
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:04:04.0-scsi-2:1:0:0 ->
../../sdv
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:04:04.0-scsi-2:2:0:0 ->
../../sdw
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:04:04.0-scsi-2:3:0:0 ->
../../sdx
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:04:04.0-scsi-2:4:0:0 ->
../../sdy
lrwxrwxrwx 1 root root 9 2012-08-08 14:42 pci-0000:04:04.0-scsi-3:0:0:0 ->
../../sdz
lrwxrwxrwx 1 root root 10 2012-08-08 14:42 pci-0000:04:04.0-scsi-3:1:0:0 ->
../../sdaa
lrwxrwxrwx 1 root root 10 2012-08-08 14:42 pci-0000:04:04.0-scsi-3:2:0:0 ->
../../sdab
lrwxrwxrwx 1 root root 10 2012-08-08 14:42 pci-0000:04:04.0-scsi-3:3:0:0 ->
../../sdac
lrwxrwxrwx 1 root root 10 2012-08-08 14:42 pci-0000:04:04.0-scsi-3:4:0:0 ->
../../sdad
lrwxrwxrwx 1 root root 10 2012-08-08 14:42 pci-0000:06:04.0-scsi-0:0:0:0 ->
../../sdaf
lrwxrwxrwx 1 root root 10 2012-08-08 14:42 pci-0000:06:04.0-scsi-0:1:0:0 ->
../../sdag
lrwxrwxrwx 1 root root 10 2012-08-08 14:42 pci-0000:06:04.0-scsi-0:2:0:0 ->
../../sdah
lrwxrwxrwx 1 root root 10 2012-08-08 14:42 pci-0000:06:04.0-scsi-0:3:0:0 ->
../../sdai
lrwxrwxrwx 1 root root 10 2012-08-08 14:42 pci-0000:06:04.0-scsi-0:4:0:0 ->
../../sdaj
lrwxrwxrwx 1 root root 10 2012-08-08 14:42 pci-0000:06:04.0-scsi-2:0:0:0 ->
../../sdak
lrwxrwxrwx 1 root root 10 2012-08-08 14:42 pci-0000:06:04.0-scsi-2:1:0:0 ->
../../sdal
lrwxrwxrwx 1 root root 10 2012-08-08 14:42 pci-0000:06:04.0-scsi-2:2:0:0 ->
../../sdam
lrwxrwxrwx 1 root root 10 2012-08-08 14:42 pci-0000:06:04.0-scsi-2:3:0:0 ->
../../sdan
lrwxrwxrwx 1 root root 10 2012-08-08 14:42 pci-0000:06:04.0-scsi-2:4:0:0 ->
../../sdao
lrwxrwxrwx 1 root root 10 2012-08-08 14:42 pci-0000:06:04.0-scsi-3:0:0:0 ->
../../sdap
lrwxrwxrwx 1 root root 10 2012-08-08 14:42 pci-0000:06:04.0-scsi-3:1:0:0 ->
../../sdaq
lrwxrwxrwx 1 root root 10 2012-08-08 14:42 pci-0000:06:04.0-scsi-3:2:0:0 ->
../../sdar
lrwxrwxrwx 1 root root 10 2012-08-08 14:42 pci-0000:06:04.0-scsi-3:3:0:0 ->
../../sdas
lrwxrwxrwx 1 root root 10 2012-08-08 14:42 pci-0000:06:04.0-scsi-3:4:0:0 ->
../../sdat
The SCSI ids are one less than ATA ids because they start at 0 rather than 1.
So, ata4.00 is the same as scsi-3:0:0:0. On my system this means that ata4.00
is sdap.
Tim
On Aug 29, 2012, at 9:38 PM, Andy Lutomirski <l...@amacapital.net> wrote:
> One of my disks went out to lunch for a while. Logs below.
>
> Which one is it? The only useful thing in /sys/class/ata_port/ata4 is
> the device symlink, which points at
> /sys/devices/pci0000:00/0000:00:1f.2/ata4. That, in turn, has an
> ata_port directory (contains nothing I don't already know) and a link4
> directory. The ata_link directory is unhelpful, as is
> /sys/devices/pci0000:00/0000:00:1f.2/ata4/link4/dev4.0/ata_device/dev4.0.
>
> Taking a leap of faith, /sys/devices/pci0000:00/0000:00:1f.2 contains
> ata1-6 and host0-5. So maybe ata4 is host3. Following lots of
> symlinks through host3 leads me to the block device sdd. Maybe that's
> correct? I'm really not sure. Am I missing something obvious?
>
> I even tried looking for symlinks the other way, like this:
>
> /sys$ find -type l -exec echo -n {} ' ' \; -exec readlink {} \; |grep ata4
> ./devices/pci0000:00/0000:00:1f.2/ata4/ata_port/ata4/subsystem
> ../../../../../../class/ata_port
> ./devices/pci0000:00/0000:00:1f.2/ata4/ata_port/ata4/device ../../../ata4
> ./devices/pci0000:00/0000:00:1f.2/ata4/link4/ata_link/link4/subsystem
> ../../../../../../../class/ata_link
> ./devices/pci0000:00/0000:00:1f.2/ata4/link4/ata_link/link4/device
> ../../../link4
> ./devices/pci0000:00/0000:00:1f.2/ata4/link4/dev4.0/ata_device/dev4.0/subsystem
> ../../../../../../../../class/ata_device
> ./devices/pci0000:00/0000:00:1f.2/ata4/link4/dev4.0/ata_device/dev4.0/device
> ../../../dev4.0
> ./class/ata_link/link4
> ../../devices/pci0000:00/0000:00:1f.2/ata4/link4/ata_link/link4
> ./class/ata_port/ata4
> ../../devices/pci0000:00/0000:00:1f.2/ata4/ata_port/ata4
> ./class/ata_device/dev4.0
> ../../devices/pci0000:00/0000:00:1f.2/ata4/link4/dev4.0/ata_device/dev4.0
>
> No luck.
>
> [784786.047673] ata4.00: exception Emask 0x10 SAct 0x7800 SErr 0x0
> action 0x6 frozen
> [784786.047707] ata4.00: irq_stat 0x08000000, interface fatal error
> [784786.047730] ata4.00: failed command: READ FPDMA QUEUED
> [784786.047752] ata4.00: cmd 60/40:58:80:a9:48/00:00:86:00:00/40 tag
> 11 ncq 32768 in
> [784786.047753] res c0/00:40:80:15:8d/00:00:86:00:00/40 Emask
> 0x12 (ATA bus error)
> [784786.047805] ata4.00: status: { Busy }
> [784786.047819] ata4.00: failed command: READ FPDMA QUEUED
> [784786.047840] ata4.00: cmd 60/40:60:80:aa:48/00:00:86:00:00/40 tag
> 12 ncq 32768 in
> [784786.047841] res c0/00:40:80:15:8d/00:00:86:00:00/40 Emask
> 0x12 (ATA bus error)
> [784786.047893] ata4.00: status: { Busy }
> [784786.047907] ata4.00: failed command: READ FPDMA QUEUED
> [784786.047928] ata4.00: cmd 60/40:68:c0:aa:48/00:00:86:00:00/40 tag
> 13 ncq 32768 in
> [784786.047929] res c0/00:40:80:15:8d/00:00:86:00:00/40 Emask
> 0x12 (ATA bus error)
> [784786.047981] ata4.00: status: { Busy }
> [784786.047996] ata4.00: failed command: READ FPDMA QUEUED
> [784786.048016] ata4.00: cmd 60/40:70:00:ab:48/00:00:86:00:00/40 tag
> 14 ncq 32768 in
> [784786.048017] res c0/00:40:80:15:8d/00:00:86:00:00/40 Emask
> 0x12 (ATA bus error)
> [784786.048067] ata4.00: status: { Busy }
> [784786.048085] ata4: hard resetting link
> [784786.365119] ata4: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
> [784786.380854] ata4.00: ACPI cmd ef/10:06:00:00:00:00 (SET FEATURES)
> succeeded
> [784786.380860] ata4.00: ACPI cmd f5/00:00:00:00:00:00 (SECURITY
> FREEZE LOCK) filtered out
> [784786.380864] ata4.00: ACPI cmd b1/c1:00:00:00:00:00 (DEVICE
> CONFIGURATION OVERLAY) filtered out
> [784786.382279] ata4.00: ACPI cmd ef/10:06:00:00:00:00 (SET FEATURES)
> succeeded
> [784786.382283] ata4.00: ACPI cmd f5/00:00:00:00:00:00 (SECURITY
> FREEZE LOCK) filtered out
> [784786.382287] ata4.00: ACPI cmd b1/c1:00:00:00:00:00 (DEVICE
> CONFIGURATION OVERLAY) filtered out
> [784786.382747] ata4.00: configured for UDMA/133
> [784786.382761] ata4: EH complete
>
> --Andy
> --
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