RE: SSDs

Well, on a hardware basis, you can only REWRITE a memory locating on a SSD
so many times before it won't change polarity. I forget the exact number
but it wasn't that huge as I recall... The hardware detects this and
assigns alternate tracks but it's a wear issue... If you're using disk for
HIGH volume of i/o (work files, etc) you may want to keep that library on a
platter vs a stick. I'm sure there's some stats out there on latency over
time use and MTBF but I've not seen them yet...



-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of rob@xxxxxxxxx
Sent: Tuesday, September 27, 2011 3:18 PM
To: Midrange Systems Technical Discussion
Subject: RE: SSDs

I am not so sure about copying to disk being that much faster than tape.
May sound like heresy but I think you'll find people who have kick butt
tape drives like LTO3 and above agreeing they are MUCH faster than DVD and
faster than some experiments with virtual tape.

And you're right about SSD's having write limitations before failure. And,
as you've said, they do put some extra space in there you can't get to for
replacement of such. Probably unrelated but it didn't take long before
our first SSD had to be replaced. Makes you wonder how such an item could
have a hardware failure.


Rob Berendt