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тАО12-16-2005 08:22 AM
тАО12-16-2005 08:22 AM
HP Ultrium 960 and ISA 6i Controller issues.
After doing this, the Ultrium 960 tape drive was no long detected.
I then downgraded the Online ROM Flash Component for Windows - Smart Array 6i from 2.58 back to 2.48, and now the tape drive is detected again.
The other issue we are having is speed. The tape drive is connected to the external SCSI interface on the back of the DL380 D4 server.
We were told that the SA6i controller was a dual channel, and could support the raid array on the first channel and the tape drive on the second.
According to the Yosemite TapeWare XE log, we are getting an Effective Throughput 92 Mbytes/Minute. It is taking 4.5 hours to backup only 40 Gigabytes. According the drive specs, it should backup at 576 GB/hr.
Do we need a separate SCSI adapter? If so, what ones would be able to handle the tape drive speed?
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тАО12-16-2005 09:31 AM
тАО12-16-2005 09:31 AM
Re: HP Ultrium 960 and ISA 6i Controller issues.
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тАО12-17-2005 08:03 AM
тАО12-17-2005 08:03 AM
Re: HP Ultrium 960 and ISA 6i Controller issues.
As Basil says, you should avoid using any 'free' channels within your RAID system as performance will be limited. Best to use a dedicated HBA capable of U320 speeds for your 960. Follow the compatibility information links at www.hp.com/go/connect to see which HBAs are recommended. In your case the page you need is at www.hp.com/products1/storage/compatibility/tapebackup/ISS/detail/16-0024-0059.html
Use HP Library & Tape Tools to measure the performance of your disk system and tape drive independently. You'll probably find, with a dedicated HBA, the tape drive goes as fast 'as advertised' but your disk system is the limiting factor. It depends on your RAID configuration and the number of disks your are using. L&TT is available from www.hp.com/support/tapetools
Good luck!
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тАО12-20-2005 02:32 AM
тАО12-20-2005 02:32 AM
Re: HP Ultrium 960 and ISA 6i Controller issues.
I tried to run the HP tapeware diagnostics and that causes the following event.
Event Type: Error
Event Source: PlugPlayManager
Event Category: None
Event ID: 12
Date: 12/20/2005
Time: 9:24:16 AM
User: N/A
Computer: ABD-APPS
Description:
The device 'Hewlett Packard LTO Ultrium-3 drive' (SCSI\Sequential&Ven_HP&Prod_Ultrium_3-SCSI&Rev_G27D\6&209bcdd9&0&050) disappeared from the system without first being prepared for removal.
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 00 00 00 00 ....
The tapedrive then disappears and it takes a reboot to find it again.
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тАО12-28-2005 07:30 AM
тАО12-28-2005 07:30 AM
Re: HP Ultrium 960 and ISA 6i Controller issues.
After installing this card, I ran HP StorageWorks Library and Tape Tools with the following results.
Tape Test
16384 MB written in 102 seconds at 159 MB/s (This appears to be running at max capacity)
Disk Test
TOTAL: 19770 MB read (178874 files) in 1688 seconds with rate 11 MB/sec (This has increased about 5 times)
Virus Scan Disabled
TOTAL: 19770 MB read (178874 files) in 802 seconds with rate 24 MB/sec (Disabling Virus scanning doubled the throughput)
Tapestore Backup
Effective Throughput : 6.3 Mbytes/Second
: 380 Mbytes/Minute
This is much better than before, 92 MBytes/Minute.
It still seems pretty slow. Shouldn't we be getting much better disk performance?
We have 3+1 300 GB 10K Ultra320 Scsi attached to the SA6i controller. Shouldn't the tape drive be the bottleneck?
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тАО12-28-2005 03:11 PM
тАО12-28-2005 03:11 PM
Re: HP Ultrium 960 and ISA 6i Controller issues.
> TOTAL: 19770 MB read (178874 files) in 1688 seconds with rate 11 MB/sec
That gives an average file size of about 110k. The smaller the average file size, the more overhead there is in the backup app opening/closing each file. The fast the drive, the more this becomes a limiter.
Also, how fragmented is the disk drive(s)?
> Tapestore Backup
> Effective Throughput : 6.3 Mbytes/Second
: 380 Mbytes/Minute
What tape blocksize are you using in the backup app? 64K or better is recommended.
You might also want to see if there are any tape/disk buffer sizes within the backup app that can be tuned.
This white paper provides some info in optimizing performance, if you haven't seen it:
http://h71028.www7.hp.com/ERC/downloads/5982-9971EN.pdf
There's also this support document:
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&taskId=110&prodSeriesId=443365&prodTypeId=12169&objectID=lpg50460
Lastly, the 6i raid controller is not supported, so it's good that you've changed. From www.hp.com/go/connect, the supported adapters in the DL380G4 are:
This tape drive can be connected to this server by one of the following adapters:
Embedded SCSI channel (if available, External tape drives only)
268351-B21 - Dual-Channel Ultra320 SCSI HBA
374654-B21 - Single-Channel Ultra320 SCSI HBA G2
284688-B21 - Dual-Channel Ultra3 SCSI HBA *
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тАО01-04-2006 09:38 AM
тАО01-04-2006 09:38 AM
Re: HP Ultrium 960 and ISA 6i Controller issues.
It recommends leaving it at 2048 to be able to use the disaster recovery feature. Though I did try it at 65536, with no improvement.
"The HP Ultrium tape drive manages SCSI blocks in hardware so there is no overhead per block. For these tape drives, the block size does not affect performance."
The drive is defragmented, and currently is not being used as it hasn't been put into production.
Is the 24 MB/sec (with virus scan disabled) about as good as it will get for the server and drives we have?
Here are some specifics on the server, controller and drives.
DL380 D4 using Windows Server 2003
2 Intel Xeon 3.20GHz/1MB processors
4 GB PC2-3200 (2 X 2BG) Ram
4 300GB Ultra320 SCSI 10,000 RPM drives. (1 hot spare)
Controller Smart Array 6i Controller
Bus Interface 64-Bit PCI
Controller Location Embedded
Array A
Array Type Parallel SCSI
Number of Logical Drives 1
Logical Drive 1
Size 572195 MB
Fault Tolerance RAID 5
Heads 255
Sectors per Track 63
Cylinders 65535
Stripe Size 64 KB
Status OK
Failed Physical Drives None
Array Accelerator Enabled
Physical Drives Attached to Port 2
SCSI ID 0, 300 GB (Parallel SCSI)
SCSI ID 1, 300 GB (Parallel SCSI)
SCSI ID 2, 300 GB (Parallel SCSI)
Online Spare Drive(s) Port 2 : SCSI ID 3, 300 GB (Parallel SCSI)
RAID 6 (ADG) status Disabled
Hardware Revision B
Firmware Version 2.58
Rebuild Priority Low
Expand Priority Low
Current Surface Scan Delay 15 sec
Number of Arrays 1
Number of Logical Drives 1
Number of Physical Drives 4
All Physical Drives Assigned Yes
Array Accelerator
Present Yes
Cache Status Enabled
Accelerator Ratio 100% Read /0% Write
Total Memory on Controller 64 MB
Battery Pack Count 0
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тАО01-23-2006 02:17 AM
тАО01-23-2006 02:17 AM
Re: HP Ultrium 960 and ISA 6i Controller issues.
You mentioned having the Tape drive dissapearing problem. (As soon as you run L&TT)
How did you fix this? I currentlly have this problem. I am using a Smartarray 6404 controller. So the Library is on its own controller.
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тАО01-23-2006 07:08 AM
тАО01-23-2006 07:08 AM
Re: HP Ultrium 960 and ISA 6i Controller issues.
See:
Smart Array card advisory:
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&objectID=PSD_EX020516_CW01
Raid Controller Advisory:
http://seer.support.veritas.com/docs/191488.htm
Recommended HBA's:
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&objectID=lpg50063
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тАО01-23-2006 07:10 AM
тАО01-23-2006 07:10 AM
Re: HP Ultrium 960 and ISA 6i Controller issues.
See:
Smart Array card advisory:
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&objectID=PSD_EX020516_CW01
Raid Controller Advisory:
http://seer.support.veritas.com/docs/191488.htm
Recommended HBA's:
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&objectID=lpg50063
Ultrium 960 white pages are good for in depth config questions for maximum performance:
http://h71028.www7.hp.com/ERC/downloads/5983-0148EN.pdf