I need to replace a slow HP MSA20 that's a bottleneck right now (We are an HP shop). HP's only option with 3.5" SATA drives is stuck at SATA I behind a SAS controller. Dell makes an MD1000 that claims SATA II speeds behind a SAS Perc 5/E (Don't know anything about dell). Anyone got any real world info they can share? I need 3.5" SATA II at least 12 drives behind SAS, I am not concerned about space and could use multiple 1u chassis if I had to. Thanks! jlc -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20080902/b180b178/attachment-0002.html>
Joseph L. Casale schrieb:> > I need to replace a slow HP MSA20 that?s a bottleneck right now (We > are an HP shop). > HP?s only option with 3.5? SATA drives is stuck at SATA I behind a SAS > controller. > > Dell makes an MD1000 that claims SATA II speeds behind a SAS Perc 5/E > (Don?t know anything about dell). > > > > Anyone got any real world info they can share? I need 3.5? SATA II at > least 12 drives behind SAS, > > I am not concerned about space and could use multiple 1u chassis if I > had to. >Promise VTRAK J610sS? We use it with Solaris and ZFS - I'm not too keen on using LVM on more than a handful of disks. IMO, 16 disks is probably the minimum to get some decent non-linear performance out of SATA. If you have the money, you can go for a SUN J4500 ;-) Rainer
Hi, I assume you're talking about the MSA60? We have several of those installed and haven't seen any bottle necks there. Even the fastest SATA drives fall short of the 150MB/sec max SATA I throughput. And if you could push the 1.5Gb/sec on the SATA side, then the SAS side with a 4x port (4x3Gb/sec) would become your bottleneck. Peter. On Tuesday 02 September 2008 11:23:00 am Joseph L. Casale wrote:> I need to replace a slow HP MSA20 that?s a bottleneck right now (We are an > HP shop). HP?s only option with 3.5? SATA drives is stuck at SATA I behind > a SAS controller. Dell makes an MD1000 that claims SATA II speeds behind a > SAS Perc 5/E (Don?t know anything about dell). > Anyone got any real world info they can share? I need 3.5? SATA II at least > 12 drives behind SAS, I am not concerned about space and could use multiple > 1u chassis if I had to. > Thanks!
Joseph L. Casale wrote:> Anyone got any real world info they can share? I need 3.5" SATA II at least > 12 drives behind SAS, > I am not concerned about space and could use multiple 1u chassis if I had > to.What about this? http://h18000.www1.hp.com/products/quickspecs/13045_na/13045_na.html The MSA2000sa is a 2U direct attach, external shared storage solution designed for small to medium size deployments or remote locations. It comes in two models - a basic single controller model for low initial cost with the ability to upgrade later; and a model with dual controllers standard for maximum performance. This solution offers a SAS host nterface to accommodate twelve 3.5 inch enterprise class SAS drives and archival-class SATA drives. Additional capacity can easily be added when needed by attaching up to three MSA2000 12 bay drive enclosures. Maximum raw capacity ranges from 3.6TB SAS or 12TB SATA in the base cabinet, to over 14.4TB SAS or 48TB SATA with the addition of the maximum number of drive enclosures. This page says it supports SATA II http://h18006.www1.hp.com/storage/disk_storage/msa_diskarrays/san_arrays/index.html nate