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?
Thank you
Abe
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At Wed, 05 Jan 2011 17:53:16 +0100 CentOS mailing list centos@centos.org wrote:
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?
The current CentOS 5 kernel (CentOS 5.5: 2.6.18-194.26.1.el5) has multiple LUN support enabled (this is the stock kernel):
sauron.deepsoft.com% grep LUN /boot/config-2.6.18-194.26.1.el5 CONFIG_PREEMPT_VOLUNTARY=y # Some SCSI devices (e.g. CD jukebox) support multiple LUNs CONFIG_SCSI_MULTI_LUN=y
Upgrading to 5.5 is probably a good idea anyway.
Thank you
Abe
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CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
On January 5, 2011 08:53:16 am Abilio Carvalho wrote:
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
Multiple LUN support has worked fine in Linux since, well, since there has been Linux on SCSI afaik. If your SCSI controller sees it CentOS should see it. Unless the driver sucks.
On Wed, Jan 05, 2011 at 10:37:23AM -0800, Alan Hodgson wrote:
On January 5, 2011 08:53:16 am Abilio Carvalho wrote:
I have Centos 5.2 and am trying to set up my first tape loader, a
Multiple LUN support has worked fine in Linux since, well, since there has been Linux on SCSI afaik. If your SCSI controller sees it CentOS should see it. Unless the driver sucks.
RedHat 4 definitely didn't scan multiple LUNs by default, even though the drivers could handle it. I thought RedHat 5 did, but it's possible to configure it not to.
Anyway https://access.redhat.com/kb/docs/DOC-3293
At Wed, 5 Jan 2011 13:43:24 -0500 CentOS mailing list centos@centos.org wrote:
On Wed, Jan 05, 2011 at 10:37:23AM -0800, Alan Hodgson wrote:
On January 5, 2011 08:53:16 am Abilio Carvalho wrote:
I have Centos 5.2 and am trying to set up my first tape loader, a
Multiple LUN support has worked fine in Linux since, well, since there has been Linux on SCSI afaik. If your SCSI controller sees it CentOS should see it. Unless the driver sucks.
RedHat 4 definitely didn't scan multiple LUNs by default, even though the drivers could handle it. I thought RedHat 5 did, but it's possible to configure it not to.
The CentOS 4.8 kernel I have (2.6.9-89.0.16.EL) does not have CONFIG_SCSI_MULTI_LUN set:
sauron.deepsoft.com% grep LUN /boot/config-2.6.9-89.0.16.EL CONFIG_PREEMPT_VOLUNTARY=y # Some SCSI devices (e.g. CD jukebox) support multiple LUNs # CONFIG_SCSI_MULTI_LUN is not set
But the CentOS 5.5 kernel (-2.6.18-194.26.1.el5) does:
sauron.deepsoft.com% grep LUN /boot/config-2.6.18-194.26.1.el5 CONFIG_PREEMPT_VOLUNTARY=y # Some SCSI devices (e.g. CD jukebox) support multiple LUNs CONFIG_SCSI_MULTI_LUN=y
From: Abilio Carvalho abilio.carvalho@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
I and a colleague tried for years to get one of these to work automatically and never got it working. Years earlier I had a Quantum Loader that never skipped a beat. We wound up using the web interface. Best of luck with your project.
-- Thanks,
Gene Brandt SCSA 8625 Carriage Road River Ridge, LA 70123
home 504-737-4295
cell 504-452-3250
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On Fri, 2011-01-07 at 02:51 -0800, John Doe wrote:
From: Abilio Carvalho abilio.carvalho@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
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
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