Seagate 1TB without buffer?

[prvprv]

Bought Seagate SATA 1TB HDD for 3250/- at Ameerpet.

I got a strange problem here.

The model number of this drive is ST31000528AS. When i chekced the info of this drive in Everest, HDTune, hwinfo softwares it shows that buffer size is UNKNOWN (or) n/a.

The OS drive which is a 500GB Seagate SATA (418AS) has 16MB buffer showing in all the above softwares.

Is it because of firmware? 500GB drive has older version (CC37) while the new 1TB drive has CC38. What might be the problem? does anyone else faced the same problem?

HD Tune results

Old 500GB
HD Tune: ST3500418AS Benchmark

Transfer Rate Minimum : 52.3 MB/sec
Transfer Rate Maximum : 131.7 MB/sec
Transfer Rate Average : 103.4 MB/sec
Access Time : 14.6 ms
Burst Rate : 103.4 MB/sec
CPU Usage : 13.8%


New 1TB
HD Tune: ST31000528AS Benchmark

Transfer Rate Minimum : 61.6 MB/sec
Transfer Rate Maximum : 122.0 MB/sec
Transfer Rate Average : 95.8 MB/sec
Access Time : 13.6 ms
Burst Rate : 177.5 MB/sec
CPU Usage : 12.8%