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03-02-2015 01:18 AM - edited 03-02-2015 04:42 AM
03-02-2015 01:18 AM - edited 03-02-2015 04:42 AM
MSL2024/SAS discovery problems in RHEL 6.5 system
Hi:
We have discovery problems with HP StoreEver MSL 2024/SAS robotic library in RHEL 6.5 Linux operating system.
- Our hardware provider connected MSL2024/SAS to a HP H221 PCIe 3.0 SAS (HP H221 PCIe 3.0 SAS) with a HP SAS Min-Min 1x-2 m cable ( only 1 SAS Min-Min connected for the physical installation).
- Our MSL2024/SAS has 2 Drivers -SAS-> HP StoreEver MSL LTO-6 Ultrium 6250 SAS- C0H27A.
We installed RHEL 6.5 x86_64 operating system:
# uname -a
Linux 2.6.32-431.el6.x86_64 #1 SMP Sun Nov 10 22:19:54 EST 2013 x86_64 x86_64 x86_64 GNU/Linux
# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 6.5 (Santiago)
- The OS discovered only 2 Drives LTO6, it didn’t show medium changer/picker of tape Library MSL2024 and HP H221 PCIe 3.0 SAS controller didin't detect too.
In RHEL system this is the command line output of the discovered SCSI devices:
# cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 03 Id: 00 Lun: 00
Vendor: HP Model: P420 Rev: 6.00
Type: RAID ANSI SCSI revision: 05
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: HP Model: LOGICAL VOLUME Rev: 6.00
Type: Direct-Access ANSI SCSI revision: 05
Host: scsi1 Channel: 00 Id: 00 Lun: 00
Vendor: HP Model: Ultrium 6-SCSI Rev: 352W
Type: Sequential-Access ANSI SCSI revision: 06
Host: scsi2 Channel: 00 Id: 00 Lun: 00
Vendor: hp Model: DVDRAM GTA0N Rev: WB00
Type: CD-ROM ANSI SCSI revision: 00
Host: scsi2 Channel: 01 Id: 00 Lun: 00
Vendor: HP Model: B120i Rev: 4.10
Type: RAID ANSI SCSI revision: 05
Host: scsi3 Channel: 00 Id: 00 Lun: 00
Vendor: TOSHIBA Model: TransMemory Rev: 1.00
Type: Direct-Access ANSI SCSI revision: 02
- With HP L&TT we have the same results/output: SCSI rescans results:
Main >
--------------------------------------------------------------------------------------------------------------------------------------------
Type the corresponding number to select a device, or enter a blank command for a command list
Libraries/Autoloaders:
Processors/Enclosures:
1 HP B120i (Address: 21.0.0[2-/dev/sg4])
2 HP P420 (Address: 3.0.0[0-/dev/sg0])
Drives:
3 HP Ultrium 6-SCSI (Address: 10.0.0[1-/dev/sg2])
Other Devices:
4 HP LOGICAL VOLUME (Address: 0.0.0[0-/dev/sg1])
5 TOSHIBA TransMemory (Address: 30.0.0[3-/dev/sg5])
Any advice/idea to correctly discover MSL2024/SAS in RHEL 6.5 system?
We are not completely sure where the problem is:
- In RHEL 6.5: Is it necessary to update the HP driver’s controller P420 SAS interface? This has been done.
- In RHEL kernel parameters: CONFIG_SCSI_MULTI_LUN-> in 2.6.32-431.el6.x86_64 Kernels, is it necessary to change or activate these kernel parameters?
We also tried to manually add medium changer:
# echo "scsi add-single-device 1 0 0 1" > /proc/scsi/scsi
# cat /proc/scsi/scsi-> same results than above
- Do we need two HP sas min-min 1x 2m cables plugged into both drivers (at the same time) for a correct OS SCSI scan and OS load?
Thank you in advance for your suggestions and support.
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03-02-2015 08:48 AM - edited 03-02-2015 08:48 AM
03-02-2015 08:48 AM - edited 03-02-2015 08:48 AM
Re: MSL2024/SAS discovery problems in RHEL 6.5 system
Looks like the H221 is not shown at all? Where is the controller installed? What server model?
Hope this helps!
Regards
Torsten.
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