Guru3D.com Forums

Go Back   Guru3D.com Forums > Hardware > SSD and HDD storage
SSD and HDD storage This section covers storage hardware like SSDs HDDs, RAID chatter and everything related


Reply
 
Thread Tools Display Modes
Old
  (#26)
scheherazade
Maha Guru
 
Videocard: (.) an
Processor: sb-e water
Mainboard: p9x79 ws
Memory: 32 gig
Soundcard: spdif 4x12" driver towers
PSU: dual 1000w
Default 04-23-2012, 19:53 | posts: 2,042 | Location: NOVA

Quote:
Originally Posted by Agent-A01 View Post
like what? all sandforce drives use 512bytes, the new indilix based drive from ocz uses 512bytes, the samsung 830s use 512bytes.. those are the only recent ones i can think of.
You're thinking of the block size as exposed by the API (Which AFAIK all SSDs use 512).

The internal block size is 4k/8k.


Quick google :

http://www.pcper.com/reviews/Storage...Force-Steroids

"I should note that as with other 480GB SandForce-driven SSD's, *any* SandForce 2281 SSD with a capacity greater than 256GB will see a dip in 4K IOPS performance. This is due to the way the SF controller handles the mapping of LBA's. To double capacity from 240GB to 480GB, the SandForce controller's finite number of allocations must be reconfigured to utilize 8KB blocks (up from the standard 4KB - intentionally matched to the NTFS 4KB cluster size). This negatively impacts IOPS performance as a 4KB random write translates to the equivalent of an 8KB random write once the added overhead is taken into account.

This is also clear in the Intel specs, as incompressible 4KB writes see a near 50% cut when comparing the 480GB to the 240GB capacity points."



Maybe you're thinking of erase blocks?
IIRC those are typically 512K (not 512).

-scheherazade

Last edited by scheherazade; 04-23-2012 at 20:01.
   
Reply With Quote
 
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Powered by vBulletin®
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
vBulletin Skin developed by: vBStyles.com
Copyright (c) 1995-2014, All Rights Reserved. The Guru of 3D, the Hardware Guru, and 3D Guru are trademarks owned by Hilbert Hagedoorn.