topic Re: scsi_id in Operating System - Linux

scsi_id

ossupport55 — Tue, 08 Sep 2009 08:38:37 GMT

folks,

server is RHEL 5.3. i need to find the wwid. When i issue the below commands noting is returned. What's wrong in the command?

scsi_id -g -u -d /dev/cciss/c0d0

scsi_id -g -u -s /block/cciss\!c0d0/

cheers

Re: scsi_id

Hakki Aydin Ucar — Tue, 08 Sep 2009 12:11:43 GMT

did not you get any error like Non block or class device something ?

Re: scsi_id

ossupport55 — Tue, 08 Sep 2009 12:58:50 GMT

nope, nothing. Should i check for the messages file to get the error ?

Re: scsi_id

Hakki Aydin Ucar — Tue, 08 Sep 2009 13:11:26 GMT

I think , actually you have to see some errors.For example the command:
[root@idmsv01 ~]# scsi_id -g -s /block/sda

gives open class /sys/block/sda failed: No such file or directory

because there is no sda at the given path. .

And go to vi /etc/scsi_id.config and you have to see;

# If you know all the scsi devices on your system support valid id's,
# remove the options=-b line, and mark all devices as good:

options=-g

is non comment out while options b is comment out: (as rescue from balcklist)

# If you normally don't need scsi id's, or might be attaching devices of
# an unknown functionality, black list everyone. This is the default
# behaviour (if no -b or -g is specified).
#
# options=-b

Re: scsi_id

ossupport55 — Wed, 09 Sep 2009 04:41:05 GMT

Hakki,

my scsi_id.config is as below.

options=-g

# some libata drives require vpd page 0x80
vendor="ATA",options=-p 0x80

and the commands that i executed were:

scsi_id -g -u -d /dev/cciss/c0d0
scsi_id -g -u -d /dev/cciss/c0d0p1
scsi_id -g -u -d /dev/cciss/c0d0p2
scsi_id -g -u -s /block/cciss\!c0d0/cciss\!c0d0p1
scsi_id -g -u -s /block/cciss\!c0d0

but the return code is 1 for the above commands. what am i doing wrong?

cheers

Re: scsi_id

Hakki Aydin Ucar — Wed, 09 Sep 2009 05:39:55 GMT

as far as I understand you do not have dev type scsi_id understand; when I check in my Red Hat Linux;

# scsi_id -g -u -s /block/cciss\!c0d0
/sys/block/cciss!c0d0 is not a scsi device

so if you go to the directory:

cd /sys/block
and make
ls -al

can you see

sdd ?

According to docs. need an sdd type to see WWID of the SCSI device:

# scsi_id -g -u -s /block/sdd

if you check version of RHEL :

cat /proc/version

I believe,you have to own RHEL 5.X to use scsi_id , since I have Red Hat 3.4.6-3 I cannot test for you . .

Re: scsi_id

ossupport55 — Wed, 09 Sep 2009 05:46:07 GMT

Hi

Yes it's RHEL 5.3. I have no sdd devices. But, there should be some way i can get the WWID for a scsi device.

cheers

Re: scsi_id

Hakki Aydin Ucar — Wed, 09 Sep 2009 05:54:23 GMT

Apparently you do not have scsi dev created somehow; additionally you can check these:

# hdparm -i /dev/hda

if it works you have ide not scsi like my server. .

# hdparm -i /dev/sda

if it works you have a scsi as far as I got

also a useful command:

# ls /dev/disk/by-path
pci-0000:00:1f.1-ide-0:0

Re: scsi_id

dirk dierickx — Thu, 10 Sep 2009 04:37:10 GMT

i think cciss devices don't have a wwid (however i could be mistaken).

Re: scsi_id

Hakki Aydin Ucar — Thu, 10 Sep 2009 10:01:10 GMT

>Dirk: i think cciss devices don't have a wwid (however i could be mistaken).

Probably u r right. At least it is not a scsi id asker is looking for..