Hello, On Mon, 18 Apr 2011, Patrick Shanahan wrote:
* David Haller <dnh@opensuse.org> [01-01-70 12:34]:
The _drives_ don't tell their real sector sizes!
I have a 120gb intel, hdparm -I /dev/sdc:
Logical Sector size: 512 bytes Physical Sector size: 512 bytes With SSDs, that is definitely wrong, AFAIK most use blocks of 128kB, which have to be "Read-Modified-Write" if say, a 4k Block of a file is modified. See e.g. http://techreport.com/articles.x/15433 Searching for »Intel SSD block size« (or »... blocksize«) yields more results. No software can read the blocksize though, that "blocksize" is "internal" to that SSD (and most current SATA drives with 4K blocks) and they lie to the "outside". A real PITA if you ask me, make it "jumperable" if need be, but there definitely should be a way to ask drives for their real blocksize. -dnh -- Top 100 things you don't want the sysadmin to say: 47. Say, What does "Superblock Error" mean, anyhow? -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org