think tank forum

technology » ssd

lucas's avatar
12 years ago
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lucas
i ❤ demo
it seems like every review of a ssd on newegg says they are slow or unbearably slow.

what's the deal?
bluet's avatar
12 years ago
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bluet
maybe their expectations are too high? i dunno
nny's avatar
12 years ago
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nny
M̮͈̣̙̰̝̃̿̎̍ͬa͉̭̥͓ț̘ͯ̈́t̬̻͖̰̞͎ͤ̇ ̈̚J̹͎̿̾ȏ̞̫͈y̭̺ͭc̦̹̟̦̭̫͊̿ͩeͥ̌̾̓ͨ
flash memory access speeds are very low on cheap memory. so joe ssd manufacturer in taiwan may be using cheap parts and relying entirely on the letters "ssd" to make a sale.

the real problem with SSD is that it's not really meant to be a full replacement for the hard disk. It's meant to augment it.
DaGr8Gatzby's avatar
12 years ago
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DaGr8Gatzby
Drunk by Myself
Also, SSD might kill /dev/random
lucas's avatar
12 years ago
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lucas
i ❤ demo
good read:
http://lenovoblogs.com/insidethebox/?p=141
lucas's avatar
8 years ago
r3, link
lucas
i ❤ demo
SLC SSD from intel

the intel 311 20GB is in production (available in mSATA for yum-factor).

the intel X25-E is out of production (both 32GB and 64GB capacities).

how do you guys feel about the intel 710 MLC-HET technology?
nny's avatar
8 years ago
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nny
M̮͈̣̙̰̝̃̿̎̍ͬa͉̭̥͓ț̘ͯ̈́t̬̻͖̰̞͎ͤ̇ ̈̚J̹͎̿̾ȏ̞̫͈y̭̺ͭc̦̹̟̦̭̫͊̿ͩeͥ̌̾̓ͨ
You can get USB random number generators pretty cheap
lucas's avatar
8 years ago
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lucas
i ❤ demo
huh?
Carpetsmoker's avatar
8 years ago
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Carpetsmoker
Martin
I think he's talking about keyboard/mice ;)
bluet's avatar
8 years ago
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bluet
I think he's talking about something like this:

http://www.entropykey.co.uk/
lucas's avatar
7 years ago
r2, link
lucas
i ❤ demo
i'm thinking about putting a mushkin chronos deluxe 240 GB 2.5" MLC SSD in my X220, in addition to the intel 311 20 GB eSATA SLC SSD.

i'd use the 20 GB SLC for the boot drive and the 240 GB MLC for everything else.

--

that mushkin is ranked the highest for performance by toms hardware (it is a "240 GB second-gen SandForce SSD with Toggle NAND"). it's only $200 on newegg or amazon.
lucas's avatar
7 years ago
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lucas
i ❤ demo
how about those sandisk extreme drives? storage review

sandisk extreme ssd
120 GB model for $99 on amazon ($0.823 / GB)
240 GB model for $176 on amazon ($0.735 / GB)
480 GB model for $363 on amazon ($0.756 / GB)

note: each of the three has different performance profiles.
lucas's avatar
7 years ago
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lucas
i ❤ demo
i purchased the sandisk extreme 240gb ssd for my lenovo x220. it barely fit into the drive slot.

i like it. i still have the intel 311 20gb slc msata ssd installed with the os on it. nice combo, i think.
lucas's avatar
2 months ago
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lucas
i ❤ demo
regarding the last post--that combo ended up failing. the intel 311 msata ssd died. it held my encrypted file system keys. so i lost access to all the data on the sandisk extreme ssd as well. (i learned a lesson!)

--

i put a sandisk ultra plus ssd into my home server for the os (freebsd), circa 2013. over the last six months, it's been spitting out gross errors:

kernel: (ada0:ata2:0:0:0): READ_DMA. ACB: c8 00 82 b8 f0 43 00 00 00 00 10 00
kernel: (ada0:ata2:0:0:0): CAM status: ATA Status Error
kernel: (ada0:ata2:0:0:0): ATA status: 51 (DRDY SERV ERR), error: 84 (ICRC ABRT )
kernel: (ada0:ata2:0:0:0): RES: 51 84 91 b8 f0 03 03 00 00 00 00
kernel: (ada0:ata2:0:0:0): Retrying command

the system freezes sometimes; maybe only in Xorg, i'm not sure. i think it's because the system cannot access swap quickly. it can freeze for a prolonged amount of time.

i just created a swapfile on the gmirror where data is stored. hopefully will fix it.

then need to replace that old ssd...

--

i'm trying to figure out which to buy:

samsung 860 pro 512 GB sata mlc ssd for $144
samsung 860 evo 500 GB sata mlc ssd for $80
samsung 860 evo 1 TB sata mlc ssd for $150

is the pro version worth twice the evo version? especially for someone poor(-ish) like me?

i plan to put this new drive into my laptop (x220), and move a samsung 850 pro 256 GB from the laptop to the home server (thus replacing the drive used for the os).

i generally like to buy pro or enterprise products. but it's difficult to find any advantage in this case. people say that samsung is a pain-in-the-ass for warranty exchanges, even under the pro branding. :[
bluet's avatar
2 months ago
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bluet
buy two evos, put the second one in an external enclosure, and keep a full-disk mirror!