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Determine bus device is on?
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David  
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 More options Oct 29, 5:04 pm
Newsgroups: comp.os.linux.development.system
From: "David" <t...@is.invalid>
Date: Wed, 28 Oct 2009 23:04:23 -0700
Local: Thurs, Oct 29 2009 5:04 pm
Subject: Determine bus device is on?
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Hello,

So say I have /dev/sdf and I want to know if it's on iScsi, PATA, SATA, USB,
etc ... how does one go about doing that in Linux.

TIA!!


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Josef Moellers  
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 More options Oct 29, 7:00 pm
Newsgroups: comp.os.linux.development.system
From: Josef Moellers <josef.moell...@ts.fujitsu.com>
Date: Thu, 29 Oct 2009 09:00:36 +0100
Local: Thurs, Oct 29 2009 7:00 pm
Subject: Re: Determine bus device is on?
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David wrote:
> Hello,

> So say I have /dev/sdf and I want to know if it's on iScsi, PATA, SATA,
> USB, etc ... how does one go about doing that in Linux.

BTDT

Check /sys/block/sdX/device. It is a symbolic link which points to an
entry <relativepath>/<bus>:<channel>:<id>:<lun>

HTH,

Josef
--
These are my personal views and not those of Fujitsu Technology Solutions!
Josef Möllers (Pinguinpfleger bei FTS)
        If failure had no penalty success would not be a prize (T.  Pratchett)
Company Details: http://de.ts.fujitsu.com/imprint.html


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Josef Moellers  
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 More options Oct 29, 7:02 pm
Newsgroups: comp.os.linux.development.system
From: Josef Moellers <josef.moell...@ts.fujitsu.com>
Date: Thu, 29 Oct 2009 09:02:23 +0100
Local: Thurs, Oct 29 2009 7:02 pm
Subject: Re: Determine bus device is on?
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David wrote:
> Hello,

> So say I have /dev/sdf and I want to know if it's on iScsi, PATA, SATA,
> USB, etc ... how does one go about doing that in Linux.

For a start: Check /sys/block/sdX/device. It is a symbolic link which
points to an entry <relativepath>/<bus>:<channel>:<id>:<lun>

HTH,

Josef
--
These are my personal views and not those of Fujitsu Technology Solutions!
Josef Möllers (Pinguinpfleger bei FTS)
        If failure had no penalty success would not be a prize (T.  Pratchett)
Company Details: http://de.ts.fujitsu.com/imprint.html


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David  
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 More options Oct 30, 2:29 am
Newsgroups: comp.os.linux.development.system
From: "David" <t...@is.invalid>
Date: Thu, 29 Oct 2009 08:29:20 -0700
Local: Fri, Oct 30 2009 2:29 am
Subject: Re: Determine bus device is on?
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"Josef Moellers" <josef.moell...@ts.fujitsu.com> wrote in message

news:hcbi6f$27g$3@nntp.fujitsu-siemens.com...

> David wrote:
>> Hello,

>> So say I have /dev/sdf and I want to know if it's on iScsi, PATA, SATA,
>> USB, etc ... how does one go about doing that in Linux.

> For a start: Check /sys/block/sdX/device. It is a symbolic link which
> points to an entry <relativepath>/<bus>:<channel>:<id>:<lun>

> HTH,

Thanks, I see the symbolic link now and that helps.  However it's a little
hard to get the actual information and have confidence of good results.  For
example on this system there is /dev/sda (HD on SLI RAID controller in JBOD
mode), /dev/hda (standard PATA), /dev/sdf (usb drive).   The results are:

../devices/pci0000:00/0000:00:08.0/0000:01:0a.0/host1/target1:0:0/1:0:0:0/b lock/sda
../devices/pci0000:00/0000:00:09.0/ide0/0.0/block/hda
../devices/pci0000:00/0000:00:02.2/usb1/1-2/1-2:1.0/host6/target6:0:0/6:0:0 :0/block/sdf

So first .. is it safe to assume linux will aways have the sym link with the
same number of components (slashes to bus)?  ../x/x/x/BUS  ?
Next, that RAID controller just has some weird number, how would one convert
that to know it's on a RAID bus (really PATA in RAID mode)?
Is there a list of bus names ... is it "ide", "usb", "scsi", "iscsi",
"fibre", "sata", "1394"?

or is there a much better way to do it like some file "bus" in
/sys/block/sda/bus that would have "RAID" in it ?  Well wishful thinking
anyway?


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