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[SOLVED] Determine which harddrive "ata7" is connected to.
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luringen
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Joined: 20 Aug 2014
Posts: 15
Location: Norwaaay

PostPosted: Fri Oct 02, 2015 5:30 pm    Post subject: [SOLVED] Determine which harddrive "ata7" is conne Reply with quote

Sorry if this is a noob question, but i couldn't find any posts about this.

I have this:
Code:

[ 6889.930311] ata7.00: status: { DRDY }
[ 6889.930313] ata7.00: failed command: READ FPDMA QUEUED
[ 6889.930316] ata7.00: cmd 60/08:c8:68:2e:f3/00:00:0d:00:00/40 tag 25 ncq 4096 in
                        res 40/00:50:48:9a:03/00:00:0e:00:00/40 Emask 0x10 (ATA bus error)
[ 6889.930318] ata7.00: status: { DRDY }
[ 6889.930320] ata7.00: failed command: READ FPDMA QUEUED
[ 6889.930324] ata7.00: cmd 60/08:d0:a0:6d:03/00:00:0e:00:00/40 tag 26 ncq 4096 in
                        res 40/00:50:48:9a:03/00:00:0e:00:00/40 Emask 0x10 (ATA bus error)
[ 6889.930334] ata7.00: status: { DRDY }
[ 6889.930336] ata7.00: failed command: READ FPDMA QUEUED
[ 6889.930340] ata7.00: cmd 60/08:e0:00:1c:f4/00:00:0d:00:00/40 tag 28 ncq 4096 in
                        res 40/00:50:48:9a:03/00:00:0e:00:00/40 Emask 0x10 (ATA bus error)
[ 6889.930342] ata7.00: status: { DRDY }
[ 6889.930343] ata7.00: failed command: READ FPDMA QUEUED
[ 6889.930347] ata7.00: cmd 60/08:e8:38:94:f5/00:00:0d:00:00/40 tag 29 ncq 4096 in
                        res 40/00:50:48:9a:03/00:00:0e:00:00/40 Emask 0x10 (ATA bus error)



repeated a little more times than what i pasted there.

after some googling i figured that the problem is most likely a bad sata cable, not the disk itself (none of my drives have any bad smart data)

what my question is, how can i figure out what block device (sdX) ata7.00 is?

after some dicking around in sysfs, i did:
Code:

ls /sys/class/ata_port/ata7/device/host6/target6\:0\:0/6\:0\:0\:0/block/sda/


which would indicate it is sda, (it was the only item in the block/ folder)

but i am still not 100% sure.

can anyone confirm this is correct?


Last edited by luringen on Sun Oct 04, 2015 5:21 pm; edited 1 time in total
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russK
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Joined: 27 Jun 2006
Posts: 634

PostPosted: Sat Oct 03, 2015 3:44 am    Post subject: Reply with quote

I've had the same issue before and searched for a method of determining, I kindof trust this script below. I wish i knew who peter and the subsequent poster was, they're both awesome. :D


Code:
#!/bin/bash
# note: inspired by Peter
#
# *UPDATE 1* now we're no longer parsing ls output
# *UPDATE 2* now we're using an array instead of the <<< operator, which on its
# part insists on a writable /tmp directory:
# restricted environments with read-only access often won't allow you that

# save original IFS
OLDIFS="$IFS"

for i in /sys/block/sd*; do
 readlink $i |
 sed 's^\.\./devices^/sys/devices^ ;
      s^/host[0-9]\{1,2\}/target^ ^ ;
      s^/[0-9]\{1,2\}\(:[0-9]\)\{3\}/block/^ ^' \
 \
  |
  while IFS=' ' read Path HostFull ID
  do

     # OLD line: left in for reasons of readability
     # IFS=: read HostMain HostMid HostSub <<< "$HostFull"

     # NEW lines: will now also work without a hitch on r/o environments
     IFS=: h=($HostFull)
     HostMain=${h[0]}; HostMid=${h[1]}; HostSub=${h[2]}

     if echo $Path | grep -q '/usb[0-9]*/'; then
       echo "(Device $ID is not an ATA device, but a USB device [e. g. a pen drive])"
     else
       echo $ID: ata$(< "$Path/host$HostMain/scsi_host/host$HostMain/unique_id").$HostMid$HostSub
     fi

  done

done

# restore original IFS
IFS="$OLDIFS"
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luringen
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Joined: 20 Aug 2014
Posts: 15
Location: Norwaaay

PostPosted: Sun Oct 04, 2015 5:20 pm    Post subject: Reply with quote

Hi and thanks for reply.

I figured it out by examining the script that if i just read the link in /sys/block i can see where it points to.

Thanks for the script also. I'm unsure how to mark this as solved..
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