Re: Which disk is ata4?
From: Tim Nufire <hidden>
Date: 2012-08-30 15:40:04
Also in:
lkml
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 [off-list ref] 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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