Solid State Drives (SSD)

[xkiller213]

As stated in the subject... Can't believe it's slower than a USB2 thumb drive =(

It started out fine (400+MB/s) then it slowed to a crawl... 

(in case you're wondering, that is a genuine windows 8 rtm iso downloaded from my school's ELMS)

Forgot to say, but this is a new drive just installed 1 week ago. Came with the latest firmware 000F

[xkiller213]

Also forgot to say, I partitioned my SSD into 2 drives, C: and D: 

Both partitions are aligned... 

Partition Disk #0, Partition #0

Partition Size 100.00 MB (104,857,600 bytes)

Partition Starting Offset 1,048,576 bytes

Partition Disk #0, Partition #1

Partition Size 251.73 GB (270,297,726,976 bytes)

Partition Starting Offset 105,906,176 bytes

Partition Disk #0, Partition #2

Partition Size 225.10 GB (241,704,108,032 bytes)

Partition Starting Offset 270,403,633,152 bytes

But the read and write speeds vary like crazy on the 2 drives... Any idea what's going on?

[targetbsp · Accepted solution]

Turn off drive compression on the D drive.

[xkiller213]

Ahhh.. Ok would try that.. I seriously don't remember drive compression giving such a big impact to the write speeds before.. 

[xkiller213]

But is the read speeds really so fast? Or is it an illusion?

[targetbsp]

I don't really know.  The results are odd because AS SSD uses incompressible data.  It shouldn't be affected by drive compression - but it does seem to be drastically whenever anyone uses it.  So I would guess it is an illusion that the differnce is that drastic.

But the idea shown in the benchmark is right.  Writes will be slower, reads will be faster BUT both tasks will require more CPU time so its not as simple as thinking 'well, I prefer my reads faster anyway'