Tape drives
The library supports LTO6 and later tape drives. Each drive requires a SAS or Fibre Channel cable.
| Machine Type | Base Unit | Expansion Units | Supported LTO Generations |
|---|---|---|---|
| 5544 | L8A | E8A | LTO-8, LTO-9, LTO-10 |
| 3555 | L3A | E3A | LTO-6, LTO-7, LTO-8, LTO-9 |
For minimum and maximum storage configurations, see Table 1.
| Generation | LTO™ 10 | LTO 9 | LTO 8 | LTO 7 | LTO 6 |
|---|---|---|---|---|---|
| Inquiry |
ULT3580-TDA |
ULT3580-TD9 |
ULT3580-TD8 |
ULT3580-TD7 |
ULT3580-TD6 |
| Interface (speed) |
FC (32 Gb) |
FC (8 Gbps) |
FC (8 Gbps) |
FC (8 Gbps) |
FC (8 Gbps) |
| Native data rate |
400 MB/s (LA, PA) |
400 MB/s (L9) |
360 MB/s (L8) |
300 MB/s (L7) |
160 MB/s (L6) |
| Sustained data rate (L6, L7, L8 and L9 compressed at 2.5:1 compression; L5 and earlier compressed at 2:1 compression) |
FC |
FC |
FC |
FC |
FC and SAS |
| Burst data rate |
|
|
|
|
|
| Nominal load-to-ready time |
12 seconds (LA, PA) |
17 seconds | 15 seconds | 15 seconds | 12 seconds |
| -Initialized tape | NA | 17 seconds | NA | NA | NA |
| -Uninitialized tape2 | NA | 40-120 minutes | NA | NA | NA |
| Nominal unload time | 27 seconds (LA, PA) | 30 seconds | 24 seconds | 20 seconds | 17 seconds |
| Average space record time from load point |
73 seconds (PA) 65 seconds (LA) |
45 seconds | 59 seconds | 56 seconds | 62 seconds |
| Average rewind time (REWIND command) |
75 seconds (PA) 62 seconds (LA) |
55 seconds | 59 seconds | 60 seconds | NA |
| Average rewind time (part of UNLOAD command, dependent on mount activity)3 | |||||
| Less than 5 Gb of contiguous data transferred | NA | 55 seconds | 59 seconds | 60 seconds | NA |
| 5 Gb to 50 Gb of contiguous data transferred | NA | 110 seconds | 59 seconds | 60 seconds | NA |
| All other types of mount activity | NA | 165 seconds | 59 seconds | 60 seconds | 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 Media optimization for more information. 3 See Archive mode unthread for more information. Remember:
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| Generation | LTO 9 | LTO 8 | LTO 7 | LTO 6 | |
|---|---|---|---|---|---|
| Inquiry |
ULT3580-HH9 ULTRIUM-HH9 |
ULT3580-HH8 |
ULT3580-HH7 |
ULT3580-HH6 |
|
| Interface (speed) |
FC (8 Gbps) SAS (12 Gbps) |
FC (8 Gbps) |
FC (8 Gbps) |
FC (8 Gbps) |
|
| Native data rate |
300 MB/s (L9) 300 MB/s (L8) |
300 MB/s (L8) |
300 MB/s (L7) |
160 MB/s (L6) |
|
| Sustained data rate (L6, L7, L8 and L9 compressed at 2.5:1 compression; L5 and earlier compressed at 2:1compression) |
FC |
FC |
FC |
FC and SAS |
|
| Burst data rate |
|
|
|
|
|
| Nominal load-to-ready time | 16 seconds | 15 seconds | 15 seconds | 12 seconds | |
| -Initialized tape | 16 seconds | NA | NA | NA | |
| -Uninitialized tape2 | 40-132 minutes | NA | NA | NA | |
| Nominal unload time | 56 seconds | 24 seconds | 20 seconds | 17 seconds | |
| Average space record time from load point | 65 seconds | 59 seconds | 56 seconds | 62 seconds | |
| Average rewind time (REWIND command) | 62 seconds | 59 seconds | 60 seconds | 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 | |
| 5 Gb to 50 Gb of contiguous data transferred | 124 seconds | 59 seconds | 60 seconds | NA | |
| All other types of mount activity | 186 seconds | 59 seconds | 60 seconds | 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 Media optimization for more information. 3 See Archive mode unthread for more information. Remember:
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