@Sirius
Why is the "QUOTE" button missing from your posts ?
Your list....
1. Hitachi 7k160 (HDS 7216 16 PLA380)
2. 'Cuda 7200.9 (ST3 160 811AS)
3. Hitachi T7k250 (HDT 7225 16 DLA380)
3. 'Cuda 7200.9 (ST3 160 812AS)
The T7K250 HDDS are now a bit dated now - I am running 2 of these right now and they show their age in HD Tach - get around 55mb/s compared to Seagate 7200.10 68mb/s and the Hitachi T7K500 65mb/s. I have heard that 250GB HDDs are also available from the T7K500 series - these should be a better buy then the T7K250's.
I have a 320GB version of the T7K500 series - very fast and cool. The number in a Hitachi series indicates the largest drive made in that series - for example in the T7K500 the largest HDD is a 500GB and the 320GB HDD is called a HDT725032VLA360 which translates to
72 = 7200 RPM
50 = 500GB largest HDD in series
32 = 320GB the capacity of this HDD
3 = normal height 3.5" HDD
6 = 16 mb cache (or 8 mentioned for 8mb cache)
0 = I think this or the "A" means SATA (not sure)
theXfactor has put up a FANTASTIC post in TE giving full details of all makes of HDDs - search for it if you need details of the Seagates and Samsungs.