Pre-bench newness
Before the benches, I always perform a few fully sequential write passes on a given SSD.  This effects each in its own way.  Intel X25 series drives do not suffer from an impact on sequential transfer rate, but they do take a hit on peak IOPS due to the added overhead of having to track all LBA’s in its internal table.  Samsung drives stay fairly consistent as well.  I don’t usually report on this as there is not normally anything to report, however this time there *is* something worth bringing up.

The Indilinx drives have a bit of a cheat up their sleeves.  Part of a given flash write process is what’s called a “block erase”.  This takes some time and is part of what limits the ultimate write speed of a given SSD.  A brand new Indilinx drive presumes that all flash blocks are pre-cleared, and without having to clear each of those blocks as it comes across them, a first time write to a given block gets a bit of a speed boost.

Indilinx based OCZ Vertex and Super Talent UltraDrive ME SSDs Reviewed - Storage 52

Initial pass read: 237 MB/sec, write: 203 MB/sec

Indilinx based OCZ Vertex and Super Talent UltraDrive ME SSDs Reviewed - Storage 53

Second pass read: 230 MB/sec, write: 169 MB/sec

Both drives performed identically, and did not dip further with additional sequential write passes (*yet*).  Since these tests were done on a freshly wiped and completely clear / new drive, this is as good as it gets.  Even after the initial drop, performance is still decent.  It’s worth noting these figures are below the advertised values: 260/195 (Super Talent) and 250/180 (OCZ).  I’m guessing they are partially using first pass data as their specification.
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