Drive performance
Details about the drive tape-processing speed are shown in the following table.
Table 2. Performance rates and times
Native data rate
140 MB/second (with Ultrium 5 media)
Maximum sustained data rate (at maximum compression)
550 MB/second
Burst data rate
600 MB/second
Nominal load-to-ready time
12 seconds
Nominal unload time
17 seconds
Average rewind time
75 seconds
Note:
All sustained data rates are dependent on the capabilities of the interconnect, and application software
performance might be slower than the published performance ratings.
By using the built-in data-compression capability of the tape drive, a faster data
rate than the native data transfer rate can be achieved. However, the actual
performance of the drive is a function of many components, such as the host
system processor, disk data rate, block size, data compression ratio, SAS bus
capabilities, and system or application software.
Cartridge compatibility
The tape drive uses the IBM
®
LTO Ultrium 1,500 GB Data Cartridge and is
compatible with the cartridges of its predecessor, the IBM Half-High LTO Ultrium
4 Tape Drive. The drive has the following capabilities and limitations:
Note:
To improve system performance, the drive uses a feature called
speed
matching
to dynamically adjust its native (uncompressed) data rate to the
slower data rate of a server. For more information about speed matching,
see “Speed matching” on page 5.
Table 3. Ultrium cartridge compatibility with Ultrium tape drives
IBM Ultrium Tape
Drive
IBM LTO Ultrium Data Cartridges
1500 GB
(Ultrium 5)
800 GB
(Ultrium 4)
400 GB
(Ultrium 3)
200 GB
(Ultrium 2)
100 GB
(Ultrium 1)
Ultrium 5
Read/Write
Read/Write
Read only
Ultrium 4
Read/Write
Read/Write
Read only
Ultrium 3
Read/Write
Read/Write
Read only
Ultrium 2
Read/Write
Read/Write
Ultrium 1
Read/Write
The drive reads tapes that have been written by other licensed Ultrium 5 drives. It
also writes to tapes that can be read by other licensed Ultrium 5 drives.
In addition to using the IBM LTO Ultrium Data Cartridge with up to 1500 GB
capacity, the drive also has read and write capabilities with certified LTO Ultrium
tape cartridges.
4
Half-High LTO Gen 5 SAS Tape Drive Installation and User's Guide
Summary of Contents for L5X
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