Hitachi GST is taking on Seagate by launching a fast and small hard drive that matches the Savvio's capacity and SAS 2 interface but has four times the cache. In the enterprise 2.5-inch drive market Seagate has a 15,000rpm Savvio 15K.2 drive - two meaning second generation - that offers 73 and 146GB capacity points and has a …
146GB SAvvio 15K.2 does exist
I've been sent this mail:- "Have another look, 146-15k Savvio 15k.2 is there. I got a couple hundred of 'em, helping me do profit since April 2009."
I'm checking with Seagate because it's invisible on the web site.
What a waste.
You do realize that most enterprise drives are in a raid array and have the on drive cache turned off as a risk reduction measure, right? When drives start coming with battery backed cache let me know.
Grenade, for the monkeys that like to juggle with the pins out.
Re: What a waste
Write cache - yes. It is definitely turned off by most RAID controllers.
Read cache AFAIK usually is not.
Frankly, 64M vs 16M is not likely to make a hell lot of difference in most production deployments. It will make a difference only if you have a clued up sysadmin who have optimised the layout by hand or if you have spent a hefty wad of cash on a system that does that for you. That is the minority of sites. The majority will just stick the lot in a driver array and format it which means that metadata (journals, indexes, allocation tables) and data will end up on the same disk (courtesy of flat RAID5/6). As a result any data access to a single disk will always be accompanied by some metadata access which together will thrash the cache out to the point where it is useless.