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TA40 Dual IBM 3590*
Versatile Backup Intelligence for Tape DrivesThe TA40 IBM 3590* controller enables two IBM 3590* Tape Drives to write/read data in Mirror, Stripe & Cascade modes, plus the ability to duplicate tapes when the unit is off-line from the host system.
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Mirror Mode simultaneously generates two identical data tapes for disaster recovery and off-site back/archive, with NO PERFORMANCE PENALTY over a standard single drive. Mirror Mode is the ideal solution for SEISMIC operation where two tapes are nearly always required
Stripe Mode provides fast back-up by "striping" the data across two tapes (doubles effective drive transfer rate).
Cascade automatically writes data to second tape drive when first tape full.
Off-line Copy/Verify allows tape copying and verification without host intervention, between drives A & B or B & A gives a throughput for non compressed data of 8MB/s.
The Host interface is Ultra Wide SCSI-3, Single Ended or Differential (40MB/s).
The Slave interfaces are Fast/Wide (20MB/s), Single Ended or Differential (Ultra 40MB/s, Qtr 2/98).
Typical Timings (40MB/sec Host)
2 DrivesMirror Mode
Compression Ratio: - 0.9:1, 2:1 & 3:1
0.9:1 2:1 3:1 Write MB/s
Blk Size
Read MB/s
Write MB/s
Blk Size
Read MB/s
Write MB/s
Blk Size
Read MB/s
7.18
64k
7.91
11.97
64k
10.58
13.42
64k
13.17
7.81
128k
7.76
12.33
128k
11.71
13.15
128k
12.98
7.70
192k
7.65
12.73
192k
12.63
13.79
192k
14.15
7.72
256k
7.64
12.70
256k
12.84
13.23
256k
13.87
Stripe Mode
Compression Ratio: - 0.9:1, 2:1 & 3:1
0.9:1 2:1 3:1 Write MB/s
Blk Size
Read MB/s
Write MB/s
Blk Size
Read MB/s
Write MB/s
Blk Size
Read MB/s
15.62
64k
15.33
19.74
64k
20.73
22.46
64k
20.67
15.40
128k
15.32
23.71
128k
20.53
26.66
128k
26.25
15.17
192k
15.15
24.62
192k
23.24
26.02
192k
24.68
15.82
256k
15.12
24.55
256k
23.05
26.65
256k
25.97
All Trademarks Recognized
*IBM3590 is a recognised trademark of International Business Machines
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