background image

24

Performance checklist

The following list summarizes factors that can affect performance. They provide a guideline only 

of areas that may need further investigation. They do not attempt to explain how to configure 

individual systems. 

• Is the tape drive reading and writing data at the correct speed?
• Is the source system (hard disk) transferring data at the correct speed? 
• Is the backup application writing buffers at the correct speed? You may need to tune the 

transfer, buffer and block size settings to optimize the speed that the application writes data to 

the tape drive. Ultrium 460 tape drives have an internal buffer of 64 MB.

• Is the operating system tuned for performance? You may need to adjust the data transfer packet 

size.

• If you are in a SAN environment, are you are using one of the recommended fibre channel/

SCSI bridges?

• Are user applications, such as Exchange or database servers, optimized for backup 

performance?

• Are there other factors that could be affecting performance, such as interference or fibre 

channel infrastructure? 

gen2 external oem.fm  Page 24  Thursday, February 13, 2003  3:02 PM

Summary of Contents for Ultrium Generation 2

Page 1: ...8OWULXP HQHUDWLRQ WHUQDO 7DSH ULYHV HWWLQJ 6WDUWHG XLGH...

Page 2: ......

Page 3: ...efore you start page 3 Backup software and drivers page 5 Usage models page 7 Installing the tape drive Step 1 Check the SCSI connection page 9 Step 2 Check the drive s SCSI ID page 11 Step 3 Connect...

Page 4: ...h the furnishing performance or use of this material whether based on warranty contract or other legal theory Linear Tape Open LTO LTO Logo Ultrium and Ultrium Logo are U S trademarks of HP IBM and Se...

Page 5: ...is supplied with a 68 pin wide VHD to HD SCSI cable to attach to the host server or fibre channel bridge Fibre channel connection If you are using your tape drive on a fibre channel FC network you wil...

Page 6: ...s and all necessary cables and mounting hardware are provided in this kit If you do not have a VHD wide SCSI connector on your server or bridge you will need to purchase and install a VHD to HD adapte...

Page 7: ...plication that supports Ultriumtape drives and download any upgrades or patches if required Drivers Windows users Before you install the tape drive download the driver from the manufacturer s web site...

Page 8: ...6 Figure 1 usage models Direct attach SCSI Direct attach FC SCSI Network attach SCSI Network attach FC SCSI Storage Area Network SAN tape drive FC SCSI bridge server...

Page 9: ...tach LAN The tape drive is directly attached to a network storage server that can be accessed by a number of clients or workstations As with the direct attach model the connection is via a SCSI link o...

Page 10: ...8 Figure 2 checking the SCSI connection connecting to a FC SCSI bridge connecting to an HBA card in the server...

Page 11: ...the only device on the bus This is the recommended configuration Do not connect to a RAID controller channel This is for disk drives only 3 Is the spare port on an Ultra 3 160 or Ultra 4 320 SCSI bus...

Page 12: ...10 3 Figure 3 checking the SCSI ID...

Page 13: ...because small bits of lead could contaminate the drive Note The computer and the tape drive SCSI IDs are only checked at power on To change the SCSI ID after installation power down both the computer...

Page 14: ...12 Figure 4 connecting the SCSI cable SCSI IN Connector SCSI OUT Connector...

Page 15: ...ocumentation for information about connecting the bridge to the fibre channel adapter on the server or to the SAN fabric 4 Attach the HD connection on the SCSI cable to the SCSI IN connector on the re...

Page 16: ...14 Figure 5 connecting the power cable...

Page 17: ...trium tape drive will operate using any voltage in the range 100 240 volts 50 60 Hz No adjustment is needed 1 Plug the power cable securely into the socket on the rear panel of the drive 2 Plug the ot...

Page 18: ...16 Figure 6a loading a cartridge Figure 6b unloading a cartridge arrow indicates leading direction affix label here eject button power on off button...

Page 19: ...to check that the drive can write data to tape Use the blank cartridge supplied with the tape drive See Use the correct media on page 21 for more information about recommended cartridges To load a ca...

Page 20: ...18 Ready Drive Error Tape Error Clean Eject button Act TERM Fan PWR Fault Figure 7b rear panel indicators Power On Off button Emergency Reset Figure 7a tape drive controls and indicators...

Page 21: ...drive mechanisn has detected a hardware error Tape Error third amber Off no fault has been detected Flashing the tape currently in the drive is faulty This LED could come on for a number of reasons b...

Page 22: ...20 Figure 8 write protecting cartridges padlock indicates cartridge is protected...

Page 23: ...protect tab Write protection will not prevent a cartridge being erased by bulk erasure or degaussing Do not bulk erase Ultrium format cartridges This will destroy pre recorded servo information and ma...

Page 24: ...r humid conditions Do not leave cartridges in direct sunlight or in places where magnetic fields are present for example under telephones next to monitors or near transformers Do not drop cartridges o...

Page 25: ...drive will not be able to deliver 60 MB s transfer rates Some file systems are able to transfer data faster than others The type of data being backed up can affect backup performance for example file...

Page 26: ...e correct speed You may need to tune the transfer buffer and block size settings to optimize the speed that the application writes data to the tape drive Ultrium 460 tape drives have an internal buffe...

Page 27: ...lf If the device is displayed during boot up but cannot be found in the operating system this is more likely to be a software problem If you encounter a problem during installation and need further cl...

Page 28: ...umber is already in use Full instructions on how to change the SCSI ID are given on page 11 Description Further information It is unclear if the bus is already terminated or where an additional termin...

Page 29: ...SCSI bus has a unique ID We recommend that the Ultrium tape drive is connected to a dedicated host bus adapter Do not connect the drive to a disk RAID controller as this is not supported You have inst...

Page 30: ...ommended action If the drive does not power up all LEDs are off the power cable may not be connected to the drive properly The power on off switch incorporates a green LED If this is not on check the...

Page 31: ...oubleshooting Use the following table to interpret the front panel LED sequences and the appropriate action to take if any LED Sequence Cause Action required All LEDs OFF Drive may not have power may...

Page 32: ...ctions If the clean LED is still flashing when you load a new or known data cartridge after cleaning call for service Ready is FLASHING and Clean is ON Cleaning is in progress None The cleaning cartri...

Page 33: ...and Ready FLASHING There is a firmware download problem Insert a cartridge to clear the LED sequence If the condition persists call for service Drive Error and Ready ON with Tape Error and Clean OFF S...

Page 34: ...e It is important that you allow sufficient time for the drive to complete this process If you interrupt it you may damage the media or the tape drive 3 If the cartridge is still jammed press the emer...

Page 35: ...own good piece of media and see if it loads If it does the original cartridge is faulty and should be discarded 6 Check if another Ultrium 460 drive will accept the cartridge If it does the original d...

Page 36: ...34...

Reviews: