Forgot to say... It yu want to get maximum life from an SSD. Yo need to enable its built-in "TRIM" function. What this does is load balance the writing over the entirety of the SSD so all the sectors (pages) get written to. Older version of Linux don't do this automatically.. Yu would have to have a cron script run periodically.
The file system on a hard drive tries too keep data near the outside edge of the drive as that is there the tangental velocity of a spinning disk is greatest and it also ties to keep the data in a compact area (de-fragmente) For an SSD you want exactly the opposite of this. Yu want to keep the data scattered randomly all over the drive. It will be faster and last longer if data is sparsely distributed. TRIM does this. On Sat, Oct 28, 2017 at 12:15 AM, Chris Albertson <[email protected]> wrote: > Building a hard drive takes some very specialized trooling and > expensive factory so you don't see new hard drive companies sprouting > up. But an SSD is just a standard PCB with chips soldered on inside a > plastic box. You can almost make them in your garage so there are > lots of companies getting into the because the cost of entry is very > low. But they buy the same chips others use. All that is different > is who solders them to the board. > > I think the Silicon Per SSD is the lowest price SSD that still has > resopnable specs. Looked at them > > BTW these SSDs that have the same physical shape as a hard drive as > just a transitional technology. They are good for upgrades old > computers. But with new computers they eliminate the SATA-III > interface and connect the FLASH chip directly to the PCIe bus. SATA > has become a huge bottleneck > > On Fri, Oct 27, 2017 at 10:56 PM, Gene Heskett <[email protected]> wrote: >> Greetings; >> >> New stuff report. >> >> I just installed one of the SP 60GB drives in the G0704's Dell computer. >> I have everything copied across, theoretically I should be able to >> remove the 2 TB thats been in it for around 2 years as I am needing a >> bigger drive for amanda, whose 1TB drive is at about 87%. >> >> DF says 18% so 60GB should do ok for a while. >> >> Speed comparison with hdparm -tT: >> >> 2TB rotating drive, supposedly sata-III capable >> dev/sda6: >> Timing cached reads: 2456 MB in 2.00 seconds = 1228.06 MB/sec >> Timing buffered disk reads: 292 MB in 3.01 seconds = 96.95 MB/sec >> >> 60GB SSD; >> dev/sdb3: >> Timing cached reads: 2484 MB in 2.00 seconds = 1242.54 MB/sec >> Timing buffered disk reads: 642 MB in 3.00 seconds = 213.65 MB/sec >> >> While its rated sata-III, or 6GB/sec, that old Dell Optiplex 745 mobo >> obviously isn't. But its still pleasantly faster. Not too shabby for a >> $33 drive. :) I think I'll put the 2nd one on the rock64 as its lone >> sata socket is a sata-III capable socket. But maybe its time to round >> up a an expander and get acquainted with how they work. >> >> Moving the 2TB drive in here for amanda, will give me room to add the >> machine I use to program mesa cards, and the rock64 to its nightly >> backup schedule. >> >> These are Silicon Power SSD drives, never heard of them before. Anybody >> else here have any experience with their stuff? >> >> Cheers, Gene Heskett >> -- >> "There are four boxes to be used in defense of liberty: >> soap, ballot, jury, and ammo. Please use in that order." >> -Ed Howdershelt (Author) >> Genes Web page <http://geneslinuxbox.net:6309/gene> >> >> ------------------------------------------------------------------------------ >> Check out the vibrant tech community on one of the world's most >> engaging tech sites, Slashdot.org! http://sdm.link/slashdot >> _______________________________________________ >> Emc-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/emc-users > > > > -- > > Chris Albertson > Redondo Beach, California -- Chris Albertson Redondo Beach, California ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
