Comments on: Dumps, disks, and disasters: a detective story http://www.laurathomson.com/2013/02/dumps-disks-and-disasters-a-detective-story/ Laura Thomson's random thoughts and rants about tech and FOSS Thu, 23 May 2013 18:16:38 +0000 http://wordpress.org/?v=2.5 By: matti http://www.laurathomson.com/2013/02/dumps-disks-and-disasters-a-detective-story/#comment-5211 matti Sat, 02 Mar 2013 00:38:28 +0000 http://www.laurathomson.com/?p=145#comment-5211 That is still true for all modern SSDs due to physics. Each Flash cell has a limited write-cycle lifetime. For example the flash cells of an older Samsung 830 have a lifetime of 5000cycles while the new 840basic uses flash cells with only 3000 write cycles. I hope you use SSDs with a NAND that survive 10k cycles. All modern SSDs are spreading the writes over all the cells and the lifetimes is years for usual applications but I don't know the amount of data your are writing on Socorro each day. There is a good overview in this Forum where users wrote continuous data to the SSD until they stopped working. Look at the summary table to get a good overview. Not all user completed the tests but look at the ones with a "test ended date" and "TiB written" http://www.xtremesystems.org/forums/showthread.php?271063-SSD-Write-Endurance-25nm-Vs-34nm That is still true for all modern SSDs due to physics.
Each Flash cell has a limited write-cycle lifetime. For example the flash cells of an older Samsung 830 have a lifetime of 5000cycles while the new 840basic uses flash cells with only 3000 write cycles. I hope you use SSDs with a NAND that survive 10k cycles.

All modern SSDs are spreading the writes over all the cells and the lifetimes is years for usual applications but I don’t know the amount of data your are writing on Socorro each day.

There is a good overview in this Forum where users wrote continuous data to the SSD until they stopped working.
Look at the summary table to get a good overview. Not all user completed the tests but look at the ones with a “test ended date” and “TiB written”
http://www.xtremesystems.org/forums/showthread.php?271063-SSD-Write-Endurance-25nm-Vs-34nm

]]> By: laura http://www.laurathomson.com/2013/02/dumps-disks-and-disasters-a-detective-story/#comment-5175 laura Wed, 27 Feb 2013 01:47:50 +0000 http://www.laurathomson.com/?p=145#comment-5175 matti: that was once true of SSDs, but not any longer. matti: that was once true of SSDs, but not any longer.

]]> By: matti http://www.laurathomson.com/2013/02/dumps-disks-and-disasters-a-detective-story/#comment-5174 matti Wed, 27 Feb 2013 01:27:09 +0000 http://www.laurathomson.com/?p=145#comment-5174 You replaced the spinning disks with SSDs ? I don't think that they will survive for a long time if you write x TB of data every day to them. You replaced the spinning disks with SSDs ?
I don’t think that they will survive for a long time if you write x TB of data every day to them.

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