Tape Storage
- Drive can be Internal, External, or part of an Autoloader
- May also be called SureStore 6000 or SureStore DAT8
- 50 pin Centronics Connector on External Unit
- HP DDS-2 Tape Drive Support
- HP C1557A and Surestore DAT 24x6 DDS-3 Autoloader
- May also be called SureStore DAT24x6
- Unit is the A3716A (Surestore Autoloader)
- 50 pin Centronics Connector on External Unit
- 2 LUNs -- 0 == Tape, 1 == Autoloader
- Tape Magazine: ??? C1571A: 6 tape magazine for HP tape autoloader (C1571A)
- C1570A: Autoloader Magazine with 5x DDS-3 + Cleaner.
- 92283K = Cleaning Cartridge
- 92283L == DDS Cartridge Storage Box (12 slots)
- One Recommended load-out is DAT in 1-5, Cleaner in 6, so the
drive is cleaned automatically after writing to 5 tapes (60gb)
- Drive Addresses: 0
- Storage Slot Addresses 2-7 (Slots 1-6)
- HP Surestore DAT 24x6 Tape AutoLoader
- HP 3716A Autoloader User's Guide
- HP DAT24x6 Firmware for Library and TapeTools
- Firmware Update is via a Tape Cartridge!
Exabyte 8mm Helical Scan Tape Drive
Wangtec QIC Tape Drives
Archive QIC Tape Drives
DLT -- Digital Linear Tape.
LTO -- Linear Tape-Open.
Basically the 2nd generation DLT taken to higher capacities.
The classic 1/2" mag tape format lives on in these beasts.
They are probably the highest storage capacity drive on the
market, matched in capacity to the modern Terabyte Disks -- 1 Disk,
1 Tape.
The cost is appropriately high too, unfortunately.
1/2" tape format in a single-reel cartridge.
The 2nd reel is in the tape drive.
THis makes the format great for tape libraries: high storage densities
and easy to grab tapes.
There was a second physical format (also something -ium) that had
two reels in a cartridge, but it failed.
The write format is a Helical track written one one side, with
passes back and forth (end to end) along the tape.
This is similar
to the multi-track format of QIC, but helical instead of linear heads.
A second timing track is written on the back side of the tape so that
data can be picked up from the data side.
Each tape cartridge is chipped with a NVRAM which records the
locations of the files on the tape for quick seek access.
- LTO-1 100 GB 8 tracks per pass 48 passes
- LTO-2 200 GB 8 tracks per pass 64 passes
- LTO-3 400 GB 16 tracks per pass 44 passes
- LTO-4 800 GB 16 tracks per pass 56 passes
- LTO-5 1500 GB 16 tracks per pass 80 passes
Transfer Rates Compressed (Drive Rate 1/2 of stated)
- LTO-2 144 GB/hour 41 MB/sec
- LTO-3 432 GB/hour 122 MB/sec
- LTO-4 576 GB/hour 163 MB/sec
- LTO-5 1008 GB/hour 286 MB/sec
- LTO-3-60 Drives are slow LTO-3 drives which write at 60MB/sec
instead of 80MB/sec.
- Dell Says
- LTO-3-60 60 MB/sec 215 GB/hour (SCSI)
- LTO-3 80 MB/sec 288 GB/hour (SAS)
- LTO-4 120 MB/sec 432 GB/hour
- LTO-5 140 MB/sec 504 GB/hour
DLT Types
- DLT VS160 160 GB Compressed 16MB/sec DLTape VS1 media
AIT
DDS Digital Data Storage using
DAT Digital Audio Tape format.
MRS is the Media Recognition System
which allows drives to determine what kind of tape is
loaded into them.
It is implemnted with stripes on the leader of the tape.
8mm Tapes
QIC Tapes
Bolo's Computer Notes
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Last Modified:
Mon Feb 21 13:13:21 CST 2011
Bolo (Josef Burger)
<bolo@cs.wisc.edu>