[CentOS] Multiple LUN support

Fri Jan 7 10:51:59 UTC 2011
John Doe <jdmls at yahoo.com>

 From: Abilio Carvalho <abilio.carvalho at bbp.ch>

> I have Centos 5.2 and am trying to set up my first tape loader, a 
> Quantum  SuperLoader 3. My "cat /proc/scsi/scsi" outputs the following:
> Attached  devices:
> Host: scsi0 Channel: 00 Id: 00 Lun: 00
>    Vendor: transtec  Model: PV610F16R1C      Rev: 373I
>    Type:    Direct-Access                     ANSI SCSI revision: 05
> Host: scsi1 Channel: 00 Id: 01 Lun:  00
>    Vendor: HP       Model: Ultrium 3-SCSI   Rev:  D22D
>    Type:   Sequential-Access                 ANSI SCSI revision: 03
> Host: scsi1 Channel: 00 Id: 05  Lun: 00
>    Vendor: HP       Model: Ultrium 4-SCSI    Rev: B54Z
>    Type:   Sequential-Access                 ANSI SCSI revision: 05
> It is my  understanding that there should be TWO devices for the loader, 
> one for the  tape drive and one for itself. From reading around, it seems 
> that it's  lacking Multiple LUM support. My question is, are more recent 
> versions of  CentOS enabling that by default? Either compiling kernel 
> modules or doing a  full upgrade of the system are "big" jobs in my case, 
> but I'd prefer the  upgrade if 5.5 works out of the box. Or do I really 
> need to recompile  kernel, enable max_lums in modprobe.conf, etc?

Hum... Last time I used an autoloader, around 1999, it was working out of the 
box...
I see 3 devices: the loader, and 2 drives...
Do you mean there is really only 1 drive?

JD