IBM tape drives have double the cache, HP and storage tek have variable
speed drives (no back hitching)
ALL information is available to the public. No experience is personal.
Features 9310 Library w/ 9940A Drives IBM3494 L700 Library with
Ultrium IBM LTO Ultrium
HP surestore tape
(LTO)
Native capacity per Tape 60 GB 40 Gigs 100 GB 100 Gigs
100 Gigs
Maximum cartridge slots approximately 6000 depending on #of drives
690 2400 690
Maximum number of tape drives 80 20 72 20
Native Maximum Library Capacity 1000 Terabytes. Can connect
multiple. 250 Terabytes 69Terabytes can connect multiple. 240
Terabytes 69 Terabytes
Compression 2:1 to 2.5:1 3 to 1 2:1 to 2.5:1 2 to 1 2 to 1
ADSM Support Yes YES Yes YES
Number of tracks 288 384 384 384
SAN capable ?? YES ?? YES
Archival Storage length for tapes 15-30 years ? New
technology 30 years
Passes each tape can handle 6500 full length passes
1,000,000
Loads and unloads each tape can handle 10,000 minimum L?
20,000
Backhitch stop.start time
(smaller is better)
0.8 sec X 8X
Time of beginning of tape 18 Seconds 15
seconds
Time to data (load, thread, search) 18 Seconds 53/83 seconds
75-115 Seconds 77 Seconds
Escon/channel Yes 2-8 N 0
Parts Available Yes Yes
Reliability/Durability
(larger is better) Short-length 80,000 write/read passes per min.
Long-length 6,500 write/read passes per min. 1.5X 1,000,000
X
Sustained transfer rate 10 mb/sec. 14 MB/sec 10-15 mb/sec. 15
MB/sec 15 MB/sec
Drive Size 4.92 in. x 4.29 in. x 1.00 in. 9.17 oz.
2.5x105.4x102 (mm)
SCSI connections Yes 2 Yes 1
Mean time between failures 9310 =7,300 hrs MBF 9840 = 12,000 hrs MBF
360,000 hours 360,000 hours
Mean swaps between failures 2 million EBF 2,000,000
1,000,000
?
Jeff Bach
Home Office Open Systems Engineering
Wal-Mart Stores, Inc.
WAL-MART CONFIDENTIAL
-----Original Message-----
From: Kauffman, Tom [SMTP:[EMAIL PROTECTED]]
Sent: Wednesday, June 13, 2001 4:06 PM
To: [EMAIL PROTECTED]
Subject: Anyone using STK L-700 library with LTO drives?
We're getting ready to replace our STK 9710 and Quantum DLT-7000
drives.
It's served us well, but time and technology change and we're
starting to
see more drive failures and issues with the drive speed.
We're going to LTO drives -- they're a best-fit for our primary use
-- and
are looking at the STK L-700 and the IBM 3584. I've been seeing some
reports
of the LTO and the 3584 here, but I don't recall seeing L-700/LTO in
combination. Is anyone running this combination? Any issues/problems
with
the combination?
I'm not planning on using ACSLS or fiber-channel; just native attach
to TSM
and LVD SCSI for the library and tape drives.
TIA
Tom Kauffman
NIBCO, Inc.
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