Seem that s3700 have supercapacitor too http://www.thessdreview.com/our-reviews/s3700/ "The S3700 has power loss protection to keep a sudden outage from corrupting data, but if the system detects a fault in the two capacitors powering the system, it will voluntarily disable the volatile cache system. Unlike previous Intel PLP systems, the S3700 uses two 105c rated electrolytic 3.5v/47uF capacitors instead of a solid capacitor array" ----- Mail original ----- De: "Stefan Priebe" <s.priebe@xxxxxxxxxxxx> À: "Cedric Lemarchand" <cedric@xxxxxxxxxxx>, ceph-users@xxxxxxxxxxxxxx Envoyé: Mercredi 15 Janvier 2014 14:52:18 Objet: Re: servers advise (dell r515 or supermicro ....) Am 15.01.2014 14:33, schrieb Cedric Lemarchand: > > Le 15/01/2014 14:15, Stefan Priebe a écrit : >> >> THe DC S3700 isn't good as squential but the 520 or 525 series has the >> problem that it doesn't have a capicator. We've used Intel SSDs since >> the 160 series but for ceph we now go for Crucial m500 (has capicitor). > "Curcial m500 has capacitor", could you please give some sources about > that ? Simply google but here: http://techreport.com/review/24666/crucial-m500-ssd-reviewed and http://www.micron.com/products/solid-state-storage/client-ssd/m500-ssd Power-Loss Protection: In the rare event that power fails while the drive is operating, power-loss protection helps ensure that data isn’t corrupted. To supplement our power-sensing firmware protection, our SSD engineers designed physical power reserves (capacitors) that are specifically tailored to our NAND requirements and deliver enough power to ensure data remains intact. Stefan _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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