Generation
LTO 9
LTO 8
LTO 7
LTO 6
LTO 5
All other types of mount activity
186 seconds
59 seconds
60 seconds
NA
NA
1
By using the built-in data-compression capability of the tape drive, greater data rates than the native data transfer rate are achieved. However, the actual throughput 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.
2
Cartridge initialization time can vary. See
for more information.
3
Remember:
All sustained data rates depend on the capabilities of the interconnect.
Drive performance varies with media generation and drive interface (SAS/FC).
Drive features
Media optimization is a new feature for the LTO9 tape drive with L9/LZ media.
Recommended access order (RAO) open function
RAO enables tape control applications to accelerate the retrieval of a certain number of files from a single tape thereby reducing the seek time between those files.
The drive archive mode unthread feature is designed to fine-tune the media for long term storage by ensuring that the media inside the cartridge is stored at an
optimal tension.
To improve system performance, the drive uses a technique that is called speed matching to dynamically adjust its native (uncompressed) data rate to the slower
data rate of a server.
System performance is optimized by channel calibration.
Data cartridge capacity scaling
Capacity scaling enables faster random access to data.
The LTO tape drive supports host Application Managed Encryption (AME), with T10 encryption methods.
Media optimization
Media optimization is a new feature for the LTO9 tape drive with L9/LZ media.
The increased number of tracks used to write data on tape requires greater precision. Media optimization creates a referenced calibration for each cartridge that enables
the tape drive’s intelligent alignment to optimize data placement. LTO-9 media optimization enhances LTO tape long-term media durability.
It is important to consider when media optimization will be performed:
Media optimization will be performed on first load of L9/LZ media during initialization.
Recommendation is to perform first load in the location of deployment, which should be in a stable environment that meets the recommended environmental
specification (see
Media optimization is a one-time operation that can be completed on any drive in the environment, enabling the media to be used across all tape drives without
further optimization.
Other considerations for media optimization:
Media optimization averages 40 minutes per first load of a cartridge to a tape drive. Although most media optimizations will complete within 60 minutes some
media optimizations may take up to 2 hours.
Interruption of the process is not recommended.
A different mount will not necessarily improve the time to complete the one-time optimization.
An update to software may be required. Contact your software application provider for more details. Customized software, not provided as a standard market product,
may require modification to ensure the software can handle the extended first mount time. For additional details, review the detailed section of the
Recommended access order (RAO) open function
RAO enables tape control applications to accelerate the retrieval of a certain number of files from a single tape thereby reducing the seek time between those files.
A feature of the LTO-9 full-height drives is the ability to accept a list of User Data Segments and reorder those User Data Segments into a recommended access order that
minimizes the locate portion of the time to read those User Data Segments. This sorted list is called a Recommended Access Order (RAO) list. A User Data Segment (UDS)
is defined as a grouping of contiguous logical objects (i.e., logical blocks and filemarks) and is described by partition number, beginning logical object identifier, and ending
logical object identifier.
IBM TS22xx - TS2290, TS2280, and TS2270
85
