Re: Anyone using STK L-700 library with LTO drives?

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:KauffmanT AT NIBCO DOT COM]
        Sent:   Wednesday, June 13, 2001 4:06 PM
        To:     ADSM-L AT VM.MARIST DOT EDU
        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
        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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