The bar code reader is a part of the library accessor. The bar code reader reads each cartridge bar code label that identifies the types of cartridge magazines and tape
drive that is installed in the library. It also provides inventory feedback to the host application, Operator Panel, and Web User Interface. The library stores the customized
inventory data in memory. Library firmware supports a 6 or 8-character volume serial number (VOLSER) on the bar code label on the tape cartridge.
User interfaces
The library has two user interfaces: the Web User Interface and the Operator Panel.
The Web User Interface allows users and administrators to view and perform some library functions from remote sites. The Web User Interface can also be used to
update the library and drive firmware, and to download error logs, drive memory dumps, and other library data.
The Operator Panel is on the front of the library and allows users to work locally on the library. The Operator Panel displays library information and menu commands
that are used to run library management functions in response to the control keys on the right of the LCD display.
Supported tape drives
The library supports a half-height tape drive with Serial Attached SCSI (SAS) interface.
lists the supported tape drives.
Table 1. Supported tape drives
Generation
LTO-9
LTO-8
LTO-7
LTO-6
LTO-5
Inquiry
ULT3580-HH9
ULTRIUM-HH9
ULT3580-HH8
ULTRIUM-HH8
ULT3580-HH7
ULTRIUM-HH7
ULT3580-HH6
ULTRIUM-HH6
ULT3580-HH5
ULTRIUM-HH5
Interface (speed)
12 Gbps SAS
6 Gbps SAS
6 Gbps SAS
6 Gbps SAS
6 Gbps SAS
Native data rate
300 MB/s (L9)
300 MB/s (L8)
300 MB/s (L8)
300 MB/s (M8)
300 MB/s (L7)
300 MB/s (L7)
160 MB/s (L6)
140 MB/s (L5)
160 MB/s (L6)
140 MB/s (L5)
120 MB/s (L4)
140 MB/s (L5)
120 MB/s (L4)
80 MB/s (L3)
Sustained data rate (L9, L8, L7, and L6 compressed at 2.5:1 compression;
L5 and earlier compressed at 2:1 compression)
1
720 MB/s (L9)
720 MB/s (L8)
600 MB/s (L8)
540 MB/s (M8)
500 MB/s (L7)
500 MB/s (L7)
400 MB/s (L6)
280 MB/s (L5)
400 MB/s (L6)
280 MB/s (L5)
240 MB/s (L4)
280 MB/s (L5)
240 MB/s (L4)
160 MB/s (L3)
Burst data rate
1200 MB/s
600 MB/s
600 MB/s
600 MB/s
600 MB/s
Nominal load-to-ready time
16 seconds
15 seconds
15 seconds
12 seconds
12 seconds
Initialized tape
16 seconds
NA
NA
NA
NA
Uninitialized tape
2
40 - 132
minutes
NA
NA
NA
NA
Nominal unload time
56 seconds
24 seconds
20 seconds
17 seconds
17 seconds
Average space record time from load point
65 seconds
59 seconds
56 seconds
62 seconds
60 seconds
Average rewind time (REWIND command)
62 seconds
59 seconds
60 seconds
NA
NA
Average rewind time (part of UNLOAD command, dependent on mount activity)
3
Less than 5 GB of contiguous data transferred
62 seconds
59 seconds
60 seconds
NA
NA
5 GB to 50 GB of contiguous data transferred
124 seconds
59 seconds
60 seconds
NA
NA
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 may vary. For more information, see
.
3. See
Archive mode unthread
for more information.
Remember:
All sustained data rates depend on the capabilities of the interconnect.
Drive performance varies with media generation and drive interface.
Drive features
Media optimization is a new feature for the LTO-9 tape drive with L9/LZ media.
The LTO tape drives perform speed matching to adjust the native data rate of the tape drives as closely as possible to the net host data rate (after factoring out data
compressibility). This approach helps to reduce the number of backhitch repositions and improves throughput performance.
You can control the capacity of data cartridges to obtain faster seek time.
System performance is optimized by channel calibration.
TS2900 Tape Autoloader
5
Summary of Contents for System Storage TS2900
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