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Tape Drive Features
TAA operation in open systems environments depends on whether the user's
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storage application automatically restarts a job following a power failure or reset
condition.
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Refer to the white paper Maximizing Tape Performance with the StorageTek T10000
Tape Drives.
StorageTek Search Accelerator
The StorageTek Search Accelerator (SSA) enables FICON applications to search for a
string up to 1024 bytes in length. This feature usually enhances Mainframe HSM Audit
performance in FICON environments.
The SSA feature is available on FC and FICON drives, and application support is
required (an API is available).
Refer to the white paper Using Oracle's StorageTek Search Accelerator.
StorageTek MIR Assisted Search
The StorageTek T10000C and T10000D tape drives support access to the Media
Information Region (MIR) of the cartridge. This command is implemented using a
SCSI Read Buffer command similar to the StorageTek T10000B tape drive. MIR data
provides location information for tape records and can be used by an application to
order which records are read first from tape. The T10000 MAS N677 engineering
document describes this feature.
The MAS feature is available for the FC tape drive, and application support is
required.
StorageTek In-Drive Reclaim Accelerator
The StorageTek In-Drive Reclaim Accelerator (IDR) enables applications to reclaim
space on the tape without rewriting the entire tape. The application must save and
manage a partition map to get the full benefit of this feature. The StorageTek Virtual
Storage Manager (VSM) supports this feature with the StorageTek T10000B, T10000C,
and T10000D drives. For more detailed information about this feature, contact your
local sales representative to obtain a copy of the ALP User's Guide.
The IDR feature is available on FC and FICON drives, and application support is
required (an API is available).
1-18 StorageTek T10000 Tape Drive Operator's Guide
This feature must only be used in environments that handle
Note:
deferred errors. When this feature is enabled, sending a tape mark
does not ensure the data has successfully been written to the tape.
A deferred error may be reported when buffered data is written to
tape after the command has completed. In a FICON only
environment, duplex write operations should use this feature.
For applications designed to restart a job following a failure event, Oracle
highly recommends configuring TAA to convert File Syncs to NO-OPs but
without treating tape marks as buffered tape marks.
For applications that are not designed to restart a job following a failure event,
Oracle highly recommends duplexing output-type jobs to two tape drives.
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