WD Caviar Black WD1001FALS-00Y6A0
The first WD1001FALS came to our labs over a year ago but that was a 00J7B0-indexed version with three platters and six heads. It has gone through several revisions and is now 00Y6A0. As far as we know, the latest revision has two platters and four heads, so we can expect some changes in its performance.
WD Caviar Black WD1002FAEX-00Z3A0
Identical to the previous model externally, this one is a new HDD. It differs in cache amount (64 MB) and interface (SATA600).
WD Caviar Blue WD10EALS-00Z8A0
Like the FALS, this HDD was tested in our last-year roundup. It had the same index of 00Z8A0 then. Its specs haven’t change over the year. It is still positioned as a mainstream product with 7200 RPM and 32 megabytes of cache.
WD Caviar Blue WD10EALX-009BA0
Here’s another pair of HDDs with identical specs but different interfaces. The cache is still 32 megabytes.
WD RE4 WD1003FBYX-01Y7B0
We tested a similar HDD in our labs but it was twice the capacity. It is meant for entry-level servers and thus features better mechanics, higher reliability, extra sensors and a technology for quick error correction. As opposed to all other HDDs from Western Digital, this one’s specs explicitly say that it’s based on 2 platters and 4 heads. The spindle rotation speed is a conventional 7200 RPM whereas the buffer is as large as 64 megabytes.
Here is a table with the specs and firmware versions of the HDDs we are going to test: