On June 1, 2007 9:44:23 AM -0700 Richard Elling <[EMAIL PROTECTED]>
wrote:
Frank Cusack wrote:
On May 31, 2007 1:59:04 PM -0700 Richard Elling <[EMAIL PROTECTED]>
wrote:
CF cards aren't generally very fast, so the solid state disk vendors are
putting them into hard disk form factors with SAS/SATA interfaces.
These
If CF cards aren't fast, how will putting them into a different form
factor make them faster?
Semiconductor memories are accessed in parallel. Spinning disks are
accessed
serially. Let's take a look at a few examples and see what this looks
like...
Disk iops bw atime MTBF UER
endurance
-------------------------------------------------------------------------
---------
SanDisk 32 GByte 2.5" SATA 7,450 67 0.11 2,000,000 10^-20 ?
SiliconSystems 8 GByte CF 500 8 2 4,000,000 10^-14
>2,000,000
...
these are probably different technologies though? if cf cards aren't
generally fast, then the sata device isn't a cf card just with a
different form factor. or is the CF interface the limiting factor?
also, isn't CF write very slow (relative to read)? if so, you should
really show read vs write iops.
-frank
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