Well for now I think I'll go with velociraptor. SSD are really expensive and probaly not mature and in any case the optimum performance is only through special controllers GuidoElia HELPPC
_____ Da: Steven M. Caesare [mailto:[email protected]] Inviato: lunedì 1 marzo 2010 17.34 A: NT System Admin Issues Oggetto: RE: Which is faster ? Never suggested you don't with mechanical disks. I am suggesting that the experience you get when installing $APPLICATION$ on day 1 is not going to to be the experience you have as the drive gets full. And that's not just "currently full", it's as the available blocks have been allocated over time (as the drives favor initially deallocating blocks rather than reusing them, a drive that's only 40% full could be approaching having had all of its blocks allocated at some point during it's lifetime) In some cases, this degradation can make SSD's slower than HDD's for some write situations. http://en.wikipedia.org/wiki/Solid-state_drive#Disadvantages -sc. From: Ken Schaefer [mailto:[email protected]] Sent: Monday, March 01, 2010 10:07 AM To: NT System Admin Issues Subject: RE: Which is faster ? You will get degradation with mechanical drives as well (because you need to wait for the platters to spin around to the few remaining empty spaces, not to mention writing a large file in lots of fragments). Whilst SSDs will degrade if the disk is very, very full (TRIM will ensure that you won't have problems with drives that are only 70-80% full), the write performance of SSDs is so far beyond mechanical disks, it doesn't matter. As mentioned, I installed Exchange 2010 (three times - all with hub, CAS and mailbox) the past weekend in 7 minutes, 7:35 minutes and 7:xx (I didn't keep the last result) in a Hyper-V VM (on an SSD that was already running another VM hosting WSUS and SCOM 2007 R2). I highly doubt that would be possible on a SATA drive. Cheers Ken From: Steven M. Caesare [mailto:[email protected]] Sent: Monday, 1 March 2010 10:16 PM To: NT System Admin Issues Subject: RE: Which is faster ? SSD write performance can drop significantly as the disk gets full. TRIM support well help this some, but there is still a degradation... -sc From: Ken Schaefer [mailto:[email protected]] Sent: Monday, March 01, 2010 8:14 AM To: NT System Admin Issues Subject: RE: Which is faster ? Got some stats? IIRC any modern consumer SSD (based on Indilinx controller) will blow a mechanical drive out of the water. I installed Exchange 2010 (CAS, Hub Transport, Mailbox) in a VM in 7 minutes running on an SSD (G.Skill Falcon II - Indilinx controller). Not sure I'd be able to do that with any SATA based mechanical drive. Of course, if you buy some really old SSD, or something cheap, then performance will probably be rubbish as well.. Cheers Ken From: Martin Blackstone [mailto:[email protected]] Sent: Monday, 1 March 2010 9:01 PM To: NT System Admin Issues Subject: RE: Which is faster ? For reads yes. For writes they can be slower. From: Ken Schaefer [mailto:[email protected]] Sent: Monday, March 01, 2010 4:38 AM To: NT System Admin Issues Subject: RE: Which is faster ? WD Raptors are expensive. If OP is investigating the use of 10K RPM SATA disks, then they should look at buying SSDs... For speed, SSDs blow any mechanical drive out of the water. Cheers Ken From: Andrew S. Baker [mailto:[email protected]] Sent: Monday, 1 March 2010 8:29 PM To: NT System Admin Issues Subject: Re: Which is faster ? Tested doing what? There are only some very specific workloads where the performance difference will be noticeable. Video streaming and editing is a very different workload from manipulating lots of small, randomly distributed files. I'd favor cost rather than theoretical performance here, barring other information. -ASB: http://xeesm.com/AndrewBaker Sent from my Verizon Smartphone _____ From: "HELP_PC" <[email protected]> Date: Sun, 28 Feb 2010 07:25:47 +0100 To: NT System Admin Issues<[email protected]> Subject: Which is faster ? How can I decide if a Hard disk WD 10000 rpm 16 mb cache will perform better than a WD 7200 rpm with 64mb cache Looking fore somebody that already tested TIA ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
