HP LTO3 Tape Drive
 
HP LTO5 Tape Drive
 
HP LTO4 Tape Drive
 

PLA-Support>Sun Systems>TAPE>Tape Hardware>SN-TP: OEM Drive and Library
 

In this Document

Symptoms

Changes

Cause

Solution

Created from <SR 3-6403664185>

Applies to:

Symptoms

FE was onsite to upgrade HP LTO drive FW but HP LTT did not detect Tape Drives attached to Solaris host.

"tload" utility for Solaris was also unable to detect the drives.

Tape Drives were detected correctly at OS level but /dev/rmt/* links were missing.

Also the "iostat -En" command did not list any tape drives.

Changes

Oracle Secure Backup (OSB) is installed & configured in Solaris.

Cause

OSB uses "sgen" & "ob" drivers for Tape Devices.
During installation of OSB, the "st" driver is removed & "st.conf" file entries are hashed.
As a result HP LTT would not discover tape drives attached to the host.

Robot & Drives are deteced correctly at OS level, see explorer output below :

----uname -a ---
SunOS HOSTNAME 5.10 Generic_147440-10 sun4u sparc SUNW,SPARC-Enterprise

--luxadm -e dump_map ---
Pos Port_ID Hard_Addr Port WWN Node WWN Type
2 10f00 0 500104f000b98644 500104f000b98643 0x1 (Tape device)
3 11000 0 500104f000b98637 500104f000b98636 0x8 (Medium changer device)
4 11300 0 500104f000b9864a 500104f000b98649 0x1 (Tape device)
5 10b00 0 2100001b329dbd60 2000001b329dbd60 0x1f (Unknown Type,Host Bus Adapter)

Pos Port_ID Hard_Addr Port WWN Node WWN Type
2 10f00 0 500104f000b98641 500104f000b98640 0x1 (Tape device)
3 11400 0 500104f000b98647 500104f000b98646 0x1 (Tape device)
4 10b00 0 2100001b329d5965 2000001b329d5965 0x1f (Unknown Type,Host Bus Adapter)

--cfgadm -alv -o show_FCP_dev ---
c1::500104f000b98637 connected configured unknown STK SL500 unavailable med-changer y /devices/pci@0,600000/pci@0/pci@8/SUNW,qlc@0/fp@0,0:fc::500104f000b98637
c1::500104f000b98644 connected configured unknown IBM ULTRIUM-TD4 unavailable tape n /devices/pci@0,600000/pci@0/pci@8/SUNW,qlc@0/fp@0,0:fc::500104f000b98644
c1::500104f000b9864a connected configured unknown HP Ultrium 5-SCSI unavailable tape y /devices/pci@0,600000/pci@0/pci@8/SUNW,qlc@0/fp@0,0:fc::500104f000b9864a
c2::500104f000b98641 connected configured unknown IBM ULTRIUM-TD4 unavailable tape y /devices/pci@1,700000/pci@0/pci@0/SUNW,qlc@0/fp@0,0:fc::500104f000b98641
c2::500104f000b98647 connected configured unknown HP Ultrium 5-SCSI unavailable tape y /devices/pci@1,700000/pci@0/pci@0/SUNW,qlc@0/fp@0,0:fc::500104f000b98647

The "st" module was not loaded but the "ob" was.

--modinfo.out---
217 7b3fe000 2f00 331 1 ob (ob driver)

NOTES :
OSB uses below device links for Tape Library & Tape Drives Respectively.

/dev/scsi/changer/* & /dev/obln
/dev/scsi/sequential/* & /dev/obtn

Solution

As of now it's not possible to use LTT or "tload" in above scenario unless "st" is used which would disturb the OSB configuration.

Alternate option to try for HP LTO drives :

- Try using HP LTT Ethernet option for HP LTO5 drives. 

- Zone the drives temporarily to a  different host where OSB is not in picture and use LTT / tload normally.

- FE can use SCSI Tool Box with Magma box to attach to drives.

- For SL24/48, RMI (WebGUI) provides option to update drive FW.

NOTES : IBM LTO Drives were not affected and FE was able to access the drives over data path using ITDT.

REF      : OSB 10.4 Installation & Configuration Guide

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