topic NetRAID cache upgrade in Netservers

NetRAID cache upgrade

Nick Daisley — Wed, 12 Nov 2003 09:46:01 GMT

Forgive me if this issue is posted previously - I'm new here!

Please advise on the spec required for SIMMs to upgrade the cache memory for NetRAID, from the 16mb which seems to be standard.

Also, can anyone define just what sort of speed advantage an upgrade would give?

Many thanks,
NWD
Oxford, UK

Re: NetRAID cache upgrade

Paul R. Dittrich — Thu, 13 Nov 2003 10:00:53 GMT

Try this thread:
http://forums1.itrc.hp.com/service/forums/bizsupport/parseCurl.do?CURL=%2Fcm%2FQuestionAnswer%2F1%2C%2C0x30a9ba808b46d611abda0090277a778c%2C00.html&forumId=2&admit=716493758+1068735469423+28353475

Unless there are a lot of cache "misses" then increasing the cache won't help much. If you do lots of large sequential reads there may be some benefit but I've seen cases where extra cache *decreases* performance as too much time is wasted searching and managing the large cache space.

HTH,
Paul

Re: NetRAID cache upgrade

Nick Daisley — Thu, 13 Nov 2003 10:34:48 GMT

Thanks, I should have been more explicit about requirements. I am talking about the NetRAID on an LH4, which is built-in and has only a single SIMM slot - 72-pin, '4Mx36 EDO 50ns' in there at the moment.

Seems to me that memory which is both Parity, and EDO, is pretty rare..

Re: NetRAID cache upgrade

Paul R. Dittrich — Fri, 14 Nov 2003 07:08:00 GMT

I don't know if this is what you want but I found some 32MB (8x36) EDO parity 72-pin SIMMS here:
http://www.compgeeks.com/details.asp?invtid=8X36EDO

HTH,
Paul

Re: NetRAID cache upgrade

Nick Daisley — Fri, 14 Nov 2003 08:13:53 GMT

Just the thing! Many thanks.