On Saturday 28 October 2017 03:55:32 Chris Albertson wrote: > 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. > I assume this is an option to be put in /etc/fstab? > The keyword 'trim' is not mentioned in the man pages for fstab, mount, or tune2fs. on these wheezy systems. Where can I find this?, and how is it applied? I found something in man hdparm, but its labeled as EXTREMELY DANGEROUS, DO NOT USE!!! So I await further instructions.
Thanks Chris. > > 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 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
