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тАО01-14-2008 08:09 AM
тАО01-14-2008 08:09 AM
==================
We have 2 DL380 g4 servers, each connected to an external DAT72 tape drive via SCSI. Although the tape drives are visible to the server during bootup, they are NOT visible from within Windows Server. It appears that the driver for the DAT tape drive is not loaded, but it does not seem possible to load the relevant driver.
Any ideas?
Details
=======
Servers are HP Proliant DL380 G4, O/S is Windows Server 2003, Enterprise Edition, Build 3790. In each server, the SCSI interface is configured in Embedded Simplex mode, making it possible to connect external SCSI devices via the port on the back of the server.
There are 2 HP StorageWorks DAT 72 tape drives (HP Part No. DW009 тАУ 60005). These are located in an HP StorageWorks 1U Tape Enclosure. One tape drive is connected to each of the servers via a SCSI cable.
Symptoms
1) During bootup
The external tape drive is detected : If we run the "Option ROM Configuration for Arrays" utility during bootup, then select Configure ODBR from the main menu, the tape drive is listed as a C7438A on SCSI port 1 (this is the external SCSI port on the server) with the correct SCSI LUN.
2) From Windows Server
Under Windows Device Manager, there are no tape devices listed
The System Survey feature of the HP Insight Diagnostics tool does not list the tape drive тАУ The floppy, DVD and hard drives are all correctly listed
Scan the server using HP StorageWorks Library and Tape Tools, v4.5 тАУ This finds the internal hard drives, but not the external tape drives. Running the System Config Utility from the Utilities menu informs us that the DAT driver is not installed. Same result from running the Library & Tape Tools Installation Check.
Running the Windows driverquery utility does not list any tape drivers as being installed on the system
The DAT tape driver file (hpdat.sys) is not in C:\Windows\System32\Drivers
3) Attempt to install DAT tape driver using HP installer
Installed driver from the HP StorageWorks DAT tape drives CDROM. This claims to have successfully installed the driver. However the external tape drive is still not visible to the O/S (even after rebooting) тАУ Same symptoms as in section 2 above.
(4) Attempt to install DAT tape driver manually
Used the Install New Hardware wizard тАУ This reaches the point where you are prompted to give the location of the folder containing the drivers. At this point, an тАЬempty listтАЭ of available drivers is displayed. It is not possible to proceed as no driver can be selected for installation.
Can anybody shed any light on this problem? Thanks in advance for your help...
Solved! Go to Solution.
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тАО01-14-2008 10:49 AM
тАО01-14-2008 10:49 AM
Solution2) By setting the server SCSI backplane to simplex, you are putting the drive on the same channel as the disks. This is not supported and you can end with two devices having the same SCSI ID (disks use 0 - 5, DATs by default use 3)
3) Driver for DAT (needed for MSbackup utility) here: ftp://ftp.hp.com/pub/tape/TapeDrv/DATTapeDriverInstaller.zip
From 3 years experience with hundreds of customers, tapes work much better when connected to a non-RAID SCSI controller. I've seen very few cases of a tape connected to a SmartArray.
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тАО01-15-2008 09:11 AM
тАО01-15-2008 09:11 AM
Re: DL380 g4 / Win 2003 cannot see DAT72 / SCSI
In light of your advice, we're going to :
(1) Revert the SCSI backplane in the servers to duplex mode (I assume this will get us better performance from the disks)
...and...
(2) Add a non-RAID PCI-X SCSI card to each server (the HP SC11Xe looks like a suitable candidate) and connect this to the DAT 72 drive
Hope that sounds like a more sensible configuration.
I'll post a final reply when(if!) we get everything working...
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тАО01-15-2008 09:41 AM
тАО01-15-2008 09:41 AM
Re: DL380 g4 / Win 2003 cannot see DAT72 / SCSI
http://bizsupport.austin.hp.com/bc/docs/support/SupportManual/c01087003/c01087003.pdf
"Do not attach the drive to the same SCSI bus as your disk drive or to a RAID controller (unless you are connecting to a ProLiant server with a SmartArray 6i RAID controller)."
This last part seems to conflict with the advice (found both here and in other forum postings) to *never* connect a tape device to a SCSI RAID controller, especially one that already has disks attached. Can anyone clarify this issue?
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тАО01-15-2008 12:00 PM
тАО01-15-2008 12:00 PM
Re: DL380 g4 / Win 2003 cannot see DAT72 / SCSI
At least have it on a separate channel. On the same channel, the traffic for the disks will interfer with the traffic for the DAT, forcing it to stop and start the tape continouslly, this makes the backups slower and induces more wear and tear on the drive.
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тАО01-17-2008 03:57 AM
тАО01-17-2008 03:57 AM
Re: DL380 g4 / Win 2003 cannot see DAT72 / SCSI
Thanks for your advice.
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тАО03-14-2008 02:41 AM
тАО03-14-2008 02:41 AM
Re: DL380 g4 / Win 2003 cannot see DAT72 / SCSI
it.
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тАО03-14-2008 03:59 AM
тАО03-14-2008 03:59 AM
Re: DL380 g4 / Win 2003 cannot see DAT72 / SCSI
Or the instructions printed on the reverse of the server's lid.
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тАО03-14-2008 08:42 PM
тАО03-14-2008 08:42 PM
Re: DL380 g4 / Win 2003 cannot see DAT72 / SCSI
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тАО03-17-2008 03:42 AM
тАО03-17-2008 03:42 AM