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11-04-2012, 09:12 AM
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#1
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Senior Member
Registered: Apr 2007
Location: Buenos Aires.
Distribution: Slackware
Posts: 2,870
Rep: 
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How do I know my optical drive is an SCSI generic device?
What's asked.
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11-04-2012, 10:01 AM
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#2
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Guru
Registered: Mar 2008
Posts: 10,045
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Kind of a trick question. Most modern linux view storage by using scsi access. That doesn't mean the real physical access is scsi. For that you'd need a scsi adapter and a scsi optical drive. That is not unheard of but kind of rare.
I suspect you have some sata drive or even ide that is simply being accessed by linux as a scsi device.
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11-04-2012, 10:09 AM
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#3
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Senior Member
Registered: Nov 2002
Location: Toronto Canada
Distribution: Slackware 14.0 + 14.1
Posts: 4,773
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Just a suggestion, install the app lshw with the GTK front end. It does a nice job of listing hardware.
My optical drive is IDE, and linux sees it as scsi.
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11-04-2012, 10:23 AM
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#4
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Senior Member
Registered: Mar 2011
Location: Brisneyland
Distribution: Debian, aptosid
Posts: 3,606
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Quote:
Originally Posted by stf92
How do I know my optical drive is an SCSI generic device?
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Eyeballs! Its the only way to be sure.
Quote:
Originally Posted by jefro
That doesn't mean the real physical access is scsi. For that you'd need a scsi adapter and a scsi optical drive. That is not unheard of but kind of rare.
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Eyeballs! Its the only way to be sure. I know a techie who got badly cuaght out by IDE on SCSI (a couple of 'ACard IDE to SCSI Adapters' IIRC). |
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11-04-2012, 10:48 AM
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#5
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Senior Member
Registered: Apr 2007
Location: Buenos Aires.
Distribution: Slackware
Posts: 2,870
Original Poster
Rep:
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I ask because of the following (man page):
Code:
DESCRIPTION
cdcd allows control of a CD player either directly off of the command
line or in its own interactive query mode. Invoking cdcd without a
command will cause cdcd to enter query mode. Invoking cdcd with a com-
mand will cause cdcd to execute that command and then terminate when it
is finished.
OPTIONS
--device DEVICE
-d DEVICE
Use DEVICE as the CD device. DEVICE is the device special file
name of the CD-ROM device. Do not use a Linux SCSI Generic
device.
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11-04-2012, 01:24 PM
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#6
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Bash Guru
Registered: Jun 2004
Location: Osaka, Japan
Distribution: Debian sid + kde 3.5 & 4.4
Posts: 6,823
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Actually, I believe that's really saying not to use generic scsi device addresses, the kind that use major and minor numbers. Only use the standard /dev/sr* style device entries.
It used to be common for some cd-rom drive controlling programs to require direct device addressing, but that's rarely needed any more.
Last edited by David the H.; 11-04-2012 at 01:27 PM.
Reason: bit of rewording
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1 members found this post helpful.
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11-04-2012, 05:13 PM
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#7
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Senior Member
Registered: Apr 2007
Location: Buenos Aires.
Distribution: Slackware
Posts: 2,870
Original Poster
Rep:
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Quote:
Originally Posted by David the H.
Actually, I believe that's really saying not to use generic scsi device addresses, the kind that use major and minor numbers. Only use the standard /dev/sr* style device entries.
It used to be common for some cd-rom drive controlling programs to require direct device addressing, but that's rarely needed any more.
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I still use cdrecord thus: cdrecord <some_parameters> dev=1001,0,0 <some_other_parameters>. If I address the device as, say, /dev/hdc, then it complains, although accepts it anyways. Is this what you mean? Although in cdrecord syntax 1001,0,0 are scsibus, target, lun.
Last edited by stf92; 11-04-2012 at 05:15 PM.
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11-05-2012, 02:50 PM
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#8
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Guru
Registered: Mar 2008
Posts: 10,045
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Nothing to do with eyes. Use lsmod | grep sg
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11-06-2012, 03:16 AM
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#9
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Senior Member
Registered: Mar 2011
Location: Brisneyland
Distribution: Debian, aptosid
Posts: 3,606
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Quote:
Originally Posted by jefro
Nothing to do with eyes.
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If you have IDE HDDs or CD/DVDs drives being run on a SCSI controller, it appears to be a SCSI drive with all the hardware tools I tried.
I havent tried checking with linux hardware tools. If I had a IDE to SCSI Adapter or 5 I've give it a shot. |
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