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-   -   Do high-end SSDs last as long as desktop hard disks? (http://www.linuxquestions.org/questions/showthread.php?t=4175434583)

Ulysses_ 10-29-2012 04:50 AM

Do high-end SSDs last as long as desktop hard disks?
 
If high-end SSDs are used for servers that operate them non-stop 24-7, maybe they are built to last. Perhaps as long as low-end hard disks? Meaning, equal number of terabytes transfered until the die?

If so, might high-end server SSDs make a good swap space too?

Thinking of the 480GB revodrive 3 x2 as high-end, should I?

cascade9 10-29-2012 05:18 AM

Enterprise SSDs should last a lot longer than desktop drives. IMO even a normal desktop SSD shouldlast at least as long as a mechanical HDD.

Using intel as an example-

Intel 520 series ('desktop' level)- MTBF is 1,200,000 hrs.
http://www.intel.com/content/www/us/...ification.html

Intel 710 series ('enterprise' level) MTBF is 2,000,000 hrs.
http://www.intel.com/content/www/us/...ification.html

You cant really compare MTBF between manufacturers, as different manufacturers have different methods to get a MTBF. That said, I know the that 'top end' desktop drives and many 'enterprise' level drives came with MTBFs in the range of 1,000,000 to 1,200,000 hrs.

SSDs arent great for swap space. They have a limited number of writes. Even the 'enterprise' level drives with eMLC ('e'nterprise MLC, modded for more write cycles than consumer-grade MLC flash) have a limited write cycle.

RAM is cheap, motherboards haev huge limits these days, just buy more.

Revodrive 3 X2 is not enterprise level. Because its using a RAID 0 setup its less reliable than normal SSDs. The nearest equivilent from OCZ that is enterprise is a VeloDrive. 300GB is currently $1500+. Its also slower than the revodrive 3 X2.

Enterprise doesnt come cheap.

Ulysses_ 10-29-2012 05:47 AM

If the policy is, "dump the drive at the first failure" (no matter if the failure is terminal like an ssd running out of flash writes, or an intermittent failure like a mechanical drive sector going bad), then do enterprise SSD's and desktop mechanical drives have the same life expectancy ("mean time to dumping") or not?

cascade9 11-08-2012 05:40 AM

SSDs shouldn't run out of writes for a very long time. Most people dont trash HDDs when a sector goes bad.

Its impossible to say, 1 HDD or SSD isnt statistically significant.

onebuck 11-08-2012 06:26 AM

Member Response
 
Hi,

Way to much 'FUD' out there concerning 'SSD' life-cycle. Most new consumer 'SSD' do out last the users system needs. Most users are not saying; 'When is my HDD going to fail?'.

Most just use the device and hopefully make 'backups' for when some issue does occur for either a 'HDD' or 'SSD'. Then restore from backup when they get a new drive, be it either mechanical or solid state. Personally, I do use both style of drives. Prefer 'SSD' for speed and 'HDD' for cheap intermediate storage.

One can be very paranoid or get informed so no fears. Others just stick their head in the sand. :)


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