Well it does make since if you have mutiple gigs of space being taken up on
your servers because of data that hasn't been accessed in years. Its better
to migrate that data to cheaper media. Tape is still cheaper than disk
depending on who you are getting it from. Also the labor involved in
extending disk drive resources are extensive across 100 home directory
servers and growing. You might say why don't you get a SAN but if that SAN
is down for any reason my entired network is down. HSM is a needed product
and it should work on highly used servers or infrequently accessed servers
as well.
-----Original Message-----
From: Mark Stapleton [mailto:[EMAIL PROTECTED]]
Sent: Friday, June 15, 2001 10:49 PM
To: [EMAIL PROTECTED]
Subject: Re: HSM for NT
>>From: Dearman, Richard [mailto:[EMAIL PROTECTED]]
>>>Is anyone using the HSM for NT product that intergrates with TSM called
OTG
>>>Diskextender? Or is there any other products that do HSM on NT that
>>>intergrate with TSM. The OTG product is not very good I am having alot
of
>>>problems with it.
>
>From: Burton, Robert [mailto:[EMAIL PROTECTED]]
>>What sort of problems are you experiencing....we tested the OTG product
and
>>we thought it looked pretty good.
>
"Dearman, Richard" wrote:
> We use the software on our home directory servers. Our servers are
hanging
> when we do a drive scan and we have to disable the otg service and reboot
> the machine to get it working again. Also, the software is generating
alot
> of error messages trying to locate files. It seems to be a good product
for
> servers that don't change alot. Our home directory servers continuely
> change when users login and diskextender doesn't seem to keep up with the
> changes very well.
Stop and think about it. The purpose of HSM is to use tape, in place of
disk, for files that are infrequently accessed. It is not meant for
production boxes where files are frequently accessed. If files are being
accessed/changed frequently, there is not an HSM client/server combo in
the world that will be able to keep up with it.
I don't understood the strong interest in HSM in some IT shops. It made
sense when tape was cheap and harddisk real estate was pricey. Now that
the situation is reversed, the file access delay and added overhead of
HSM operations don't make much sense.
--
Mark Stapleton ([EMAIL PROTECTED])
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