Does the H1A use a different tape then the E1A?

---------------------------------------
Bruce Kamp
Midrange Systems Analyst II
Memorial Healthcare System
E: bkamp AT mhs DOT net
P: (954) 987-2020 x4597
F: (954) 985-1404
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-----Original Message-----
From: Seay, Paul [mailto:seay_pd AT NAPTHEON DOT COM]
Sent: Wednesday, November 20, 2002 3:31 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: 3590 Tape Drives


Actually, there are 2 speeds to be concerned with.

Data transfer from the host to the 3590 controller.
        SCSI, depends on length and type of connection (34 was the top on
SCSI E1A).
        40 MB/sec on FC E1A advertised, but I have seen higher (FC)
        70 MB/sec on FC H1A advertised (FC)

Then, compression voodoo happens so less physical bytes are written to tape.

Data transfer from the 3590 controller to the tape (referred to as "at the
head").
        9 MB/sec on B models
        14.1 MB/Sec on E models

Paul D. Seay, Jr.
Technical Specialist
Naptheon Inc.
757-688-8180


-----Original Message-----
From: Bruce Kamp [mailto:bkamp AT MHS DOT NET]
Sent: Tuesday, November 19, 2002 10:30 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: 3590 Tape Drives


Is there any increase in speed?

-----Original Message-----
From: Talafous, John G. [mailto:Talafous AT TIMKEN DOT COM]
Sent: Tuesday, November 19, 2002 10:25 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: 3590 Tape Drives


The H1A drive is a 50% capacity increase over the E1A drive.

Drive    Native capacity       Extended Length Cartridge Capacity
3590-B1A     10GB                          20GB
3590-E1A     20GB                          40GB
3590-H1A     30GB                          60GB

These numbers are without hardware compression. I believe throughput of
15MB/SEC applies to all 3590 drives thus far.

John G. Talafous              IS Technical Principal
The Timken Company            Global Software Support
P.O. Box 6927                 Data Management
1835 Dueber Ave. S.W.         Phone: (330)-471-3390
Canton, Ohio USA  44706-0927  Fax  : (330)-471-4034
talafous AT timken DOT com           http://www.timken.com


-----Original Message-----
From: Bruce Kamp [mailto:bkamp AT MHS DOT NET]
Sent: Tuesday, November 19, 2002 10:20 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: 3590 Tape Drives


Glad to hear someone is having good luck with the E1A drives.  This past
year I have had IBM out at LEAST 2 dozen times working on my drives!!!  The
worst part is they bring used parts.  They have had to go back & pickup the
same part again because the replacement parts have been BAD a bunch of
times!! I have seen posts about H1A drives.  What is the difference?


---------------------------------------
Bruce Kamp
Midrange Systems Analyst II
Memorial Healthcare System
E: bkamp AT mhs DOT net
P: (954) 987-2020 x4597
F: (954) 985-1404
---------------------------------------


-----Original Message-----
From: Talafous, John G. [mailto:Talafous AT TIMKEN DOT COM]
Sent: Tuesday, November 19, 2002 9:00 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: 3590 Tape Drives


Martina,
  I'm surprised to hear you are having 'lots' of hardware problems with 3590
drives. Do you have a maintenance agreement and have you called support when
you are experiencing problems?  You should!
  We have a 3494 library with 6 3590-E1A drives in it. These drives are
work-horses. We have had two service calls this year. But, you must remember
we are backing up 2700+ nodes, are using 700+ extended length cartridges and
keep those drives moving data around the clock.
  As for performance, I have seen transfer rates of 70GB an hour. This is on
tape to tape copies of storage pools (You won't see that when migrating disk
to tape.).
  The bottom line is that the 3590 is industrial strength! But, I must admit
having no experience with the B drive.

John G. Talafous              IS Technical Principal
The Timken Company            Global Software Support
P.O. Box 6927                 Data Management
1835 Dueber Ave. S.W.         Phone: (330)-471-3390
Canton, Ohio USA  44706-0927  Fax  : (330)-471-4034
talafous AT timken DOT com           http://www.timken.com


-----Original Message-----
From: Martina Sawatzki [mailto:msa AT OERAG DOT DE]
Sent: Tuesday, November 19, 2002 5:50 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: 3590 Tape Drives


Hi,

We are working with a 3494 IBM silo with 4  drives - 3590 type B -  which is
connected to a RS/6000. As we are having lots of  hardware problems with
these drives we think about changing them to 3590 drives type E. Does anyone
have experience with this type of tape drive ? I`m mainly interested in a
kind of comparison concerning performance and availibility between the both
types B -> E.

Thanks a lot
Martina


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