OCZ has a new line of enterprise SSDs, based on the SandForce 1500 controller. These three have a supercapacitor: OCZ Deneva Reliability 2.5" MLC SSD<http://www.oczenterprise.com/products/details/ocz-deneva-reliability-2-5-mlc-ssd.html> OCZ Deneva Reliability 2.5" SLC SSD<http://www.oczenterprise.com/products/details/ocz-deneva-reliability-2-5-slc-ssd.html> OCZ Deneva Reliability 2.5" eMLC SSD<http://www.oczenterprise.com/products/details/ocz-deneva-reliability-2-5-emlc-ssd.html> Any thoughts on how well they would work as a L2ARC/ZIL drive? Roger Hernandez -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.opensolaris.org/pipermail/zfs-discuss/attachments/20100614/10674a60/attachment.html>
On Mon, Jun 14, 2010 at 2:07 PM, Roger Hernandez <rhvarona at gmail.com> wrote:> OCZ has a new line of enterprise SSDs, based on the SandForce 1500 > controller.The SLC based drive should be great as a ZIL, and the MLC drives should be a close second. Neither is cost effective as a L2ARC, since the cache device doesn''t require resiliency or high random iops. A previous generation drive (such as the Vertex or X25-M) is probably sufficient. -B -- Brandon High : bhigh at freaks.com
Price? I cannot find it. -- This message posted from opensolaris.org
On 15/06/2010 18:46, Brandon High wrote:> On Mon, Jun 14, 2010 at 2:07 PM, Roger Hernandez<rhvarona at gmail.com> wrote: > >> OCZ has a new line of enterprise SSDs, based on the SandForce 1500 >> controller. >> > The SLC based drive should be great as a ZIL, and the MLC drives > should be a close second. > > Neither is cost effective as a L2ARC, since the cache device doesn''t > require resiliency or high random iops. A previous generation drive > (such as the Vertex or X25-M) is probably sufficient. > >If you don''t need a high random iops from you l2arc then perhaps you don''t need an l2arc at all? The whole point of having L2ARC is to serve high random read iops from RAM and L2ARC device instead of disk drives in a main pool. -- Robert Milkowski http://milek.blogspot.com
Got prices from a retailer now: 100GB - DENRSTE251E10-0100 ~1100 USD 200GB - DENRSTE251E10-0200 ~1900 USD 400GB - DENRSTE251E10-0400 ~4500 USD Prices were given to a country in Europe, so USD prices might be lower. -Arve> -----Original Message----- > From: zfs-discuss-bounces at opensolaris.org [mailto:zfs-discuss- > bounces at opensolaris.org] On Behalf Of Scott Meilicke > Sent: 15. juni 2010 22:10 > To: zfs-discuss at opensolaris.org > Subject: Re: [zfs-discuss] OCZ Devena line of enterprise SSD > > Price? I cannot find it. > -- > This message posted from opensolaris.org > _______________________________________________ > zfs-discuss mailing list > zfs-discuss at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
On Wed, June 16, 2010 07:59, Arve Paalsrud wrote:> Got prices from a retailer now: > > 100GB - DENRSTE251E10-0100 ~1100 USD > 200GB - DENRSTE251E10-0200 ~1900 USD > 400GB - DENRSTE251E10-0400 ~4500 USD > > Prices were given to a country in Europe, so USD prices might be lower.Heh. I just did a quick search on those model numbers, and three hits appear: 1. OCZ''s web page 2. the Jive interface to zfs-discuss 3. the mailman archive of zfs-discuss I think OCZ''s marketing department needs to work a little harder. :)
They''ll probably track me down and shoot me later on. :o -A> -----Original Message----- > From: David Magda [mailto:dmagda at ee.ryerson.ca] > Sent: 16. juni 2010 15:03 > To: Arve Paalsrud > Cc: ''Scott Meilicke''; zfs-discuss at opensolaris.org > Subject: Re: [zfs-discuss] OCZ Devena line of enterprise SSD > > On Wed, June 16, 2010 07:59, Arve Paalsrud wrote: > > Got prices from a retailer now: > > > > 100GB - DENRSTE251E10-0100 ~1100 USD > > 200GB - DENRSTE251E10-0200 ~1900 USD > > 400GB - DENRSTE251E10-0400 ~4500 USD > > > > Prices were given to a country in Europe, so USD prices might be > lower. > > Heh. I just did a quick search on those model numbers, and three hits > appear: > 1. OCZ''s web page > 2. the Jive interface to zfs-discuss > 3. the mailman archive of zfs-discuss > > I think OCZ''s marketing department needs to work a little harder. :) >
According to the spec page in http://www.oczenterprise.com/details/ocz-deneva-reliability-2-5-slc-ssd.html it seems that the drive has a built-in supercapacitor to protect from power outages. -- This message posted from opensolaris.org
On Wed, Jun 16, 2010 at 1:18 AM, Robert Milkowski <milek at task.gda.pl> wrote:> If you don''t need a high random iops from you l2arc then perhaps you don''t > need an l2arc at all?Sorry, random write iops. The L2ARC is filled slowly once it''s warmed up. The L2ARC is helpful because it has low latency and doesn''t steal iops from the zpool devices. -B -- Brandon High : bhigh at freaks.com
OCZ not only introduced these "enterprise" SSDs but also "Maximum Performance/Enterprise Solid State Drives" a couple of days ago. An SLC version: Vertex 2 EX http://www.ocztechnology.com/products/solid-state-drives/2-5--sata-ii/maximum-performance-enterprise-solid-state-drives/ocz-vertex-2-ex-series-sata-ii-2-5--ssd-.html And an MLC version: Vertex 2 Pro http://www.ocztechnology.com/products/solid-state-drives/2-5--sata-ii/maximum-performance-enterprise-solid-state-drives/ocz-vertex-2-pro-series-sata-ii-2-5--ssd-.html The cheapest (100Gb) Vertex 2 Pro costs about 400 euros. This brings it within reach of a lot of ZFS enthusiasts. Both are based, like the Devena line, on the sandforce 1500 controller AND both have the supercap. I''m really looking forward to see somebody posting some results for these SSD used as a ZIL and / or L2ARC. Apart from the supercap the availability of SSDs with a SAS interface is also very promising. No more "not to obtain" interposers and perhaps finally an affordable alternative to the STEC "LogZilla" Regards, Frederik -- This message posted from opensolaris.org
The EX specs page does list the supercap The pro specs page does not. -- This message posted from opensolaris.org
I just lookup it up again and as far as i can see the super cap is present in the MLC version as well as the SLC http://www.ocztechnology.com/products/solid-state-drives/2-5--sata-ii/maximum-performance-enterprise-solid-state-drives/ocz-vertex-2-pro-series-sata-ii-2-5--ssd-.html>From the page:* Available in 50GB, 100GB, 200GB, and 400GB capacities * Native TRIM support * Max IOPS Firmware * ECC Protection * Build-in Supercapacitor * Intelligent block management * Encryption feature * Seek Time: .1ms * Slim 2.5" Design * 99.8 x 69.63 x 9.3mm * Lightweight: 77g * Operating Temp: 0?C ~ 70?C * Storage Temp: -45?C ~ +85?C * Low Power Consumption: 2W in operation, .5W in standby * Shock Resistant up to 1500G * RAID Support * Compatible with Windows XP, Vista, 7, and Linux * MTBF: 2 million hours * 3-Year Warranty Maximum Performance * Max Read: up to 285MB/s * Max Write: up to 275MB/s * Sustained Write: up to 250MB/s * Random Write 4KB (Aligned): 50,000 IOPS Part Numbers * 50GB - OCZSSD2-2VTXP50G * 100GB - OCZSSD2-2VTXP100G * 200GB - OCZSSD2-2VTXP200G * 400GB - OCZSSD2-2VTXP400G Regards, Frederik -- This message posted from opensolaris.org
On Thu, Jun 17, 2010 at 09:42:44AM -0700, F. Wessels wrote:> I just lookup it up again and as far as i can see the super cap is > present in the MLC version as well as the SLCVery nice. A pair of the 50GB SLC model would be great for ZIL. Might continue to stick with the X-25M for L2ARC though based on price. Ray
On 17 jun 2010, at 18.17, Richard Jahnel wrote:> The EX specs page does list the supercap > > The pro specs page does not.They do for both on the Specifications tab on the web page: <http://www.ocztechnology.com/products/solid-state-drives/2-5--sata-ii/maximum-performance-enterprise-solid-state-drives/ocz-vertex-2-pro-series-sata-ii-2-5--ssd-.html> But not in the product brief PDFs. It doesn''t say how many rewrites you can do either. An Intel X25-E 32G has, according to the product manual, a write endurance of 1 petabyte. In full write speed, 250 MB/s, that is equal to 4000000 seconds, or about 46 days. (On the other hand you have a five year warranty, and I have been told that you can get them replaced if they wear out.) /ragge
On Thu, Jun 17, 2010 at 09:54:59AM -0700, Ragnar Sundblad wrote:> > On 17 jun 2010, at 18.17, Richard Jahnel wrote: > > > The EX specs page does list the supercap > > > > The pro specs page does not. > > They do for both on the Specifications tab on the web page: > <http://www.ocztechnology.com/products/solid-state-drives/2-5--sata-ii/maximum-performance-enterprise-solid-state-drives/ocz-vertex-2-pro-series-sata-ii-2-5--ssd-.html> > But not in the product brief PDFs. > > It doesn''t say how many rewrites you can do either. > > An Intel X25-E 32G has, according to the product manual, a write > endurance of 1 petabyte. In full write speed, 250 MB/s, that is equal > to 4000000 seconds, or about 46 days. (On the other hand you have a > five year warranty, and I have been told that you can get them > replaced if they wear out.)Do the drives keep any sort of internal counter so you get an idea of how much of the rated drive lifetime you''ve chewed through? Ray
On Thu, Jun 17, 2010 at 9:58 AM, Ray Van Dolson <rvandolson at esri.com> wrote:> Do the drives keep any sort of internal counter so you get an idea of > how much of the rated drive lifetime you''ve chewed through?I think that it''s reported via SMART. -B -- Brandon High : bhigh at freaks.com
On Thu, Jun 17, 2010 at 09:58:25AM -0700, Ray Van Dolson wrote:> On Thu, Jun 17, 2010 at 09:54:59AM -0700, Ragnar Sundblad wrote: > > > > On 17 jun 2010, at 18.17, Richard Jahnel wrote: > > > > > The EX specs page does list the supercap > > > > > > The pro specs page does not. > > > > They do for both on the Specifications tab on the web page: > > <http://www.ocztechnology.com/products/solid-state-drives/2-5--sata-ii/maximum-performance-enterprise-solid-state-drives/ocz-vertex-2-pro-series-sata-ii-2-5--ssd-.html> > > But not in the product brief PDFs. > > > > It doesn''t say how many rewrites you can do either. > > > > An Intel X25-E 32G has, according to the product manual, a write > > endurance of 1 petabyte. In full write speed, 250 MB/s, that is equal > > to 4000000 seconds, or about 46 days. (On the other hand you have a > > five year warranty, and I have been told that you can get them > > replaced if they wear out.) > > Do the drives keep any sort of internal counter so you get an idea of > how much of the rated drive lifetime you''ve chewed through? >Heh.. the marketing stuff on the ''front'' page says: "Vertex 2 EX has an ultra-reliable 10 million hour MTBF and comes backed by a three-year warranty. " And then on the specifications: "MTBF: 2 million hours" :) -- Pasi