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Hitachi HTS725032A9A364 vs Seagate ST320LT007 - 9ZV142 : better MTBF & performance

Posted on 2012-12-26
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Hitachi HTS725032A9A364 vs Seagate ST320LT007 - 9ZV142

I'm looking at the above two HDDs, the Hitachi HDD comes
with Lenovo X220 while the Seagate HDD comes with Dell
E6230.  Both have 7200rpm.

Q1:
Which of the two has better MTBF (as I had a few HDD
crashes before)

Q2:
Which has better IO performance/throughput?
Link below has specs for Hitachi, anyone has the
specs for Seagate?

http://www.ebay.com/ctg/Hitachi-Travelstar-7K500-HTS725032A9A364-320-GB-Internal-7200-RPM-2-5-0A72333-Hard-Drive-/82928111
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Question by:sunhux
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by:andyalder
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Author Comment

by:sunhux
ID: 38722977
Looks like the seek time for
Hitachi is   : 1 ms
Seagate     : 1.5 ms (track to track seek time)
                    11ms (average seek time, read)

but for external transfer rate, not sure if the following two refers to same thing:
Hitachi      : 300Mbps
Seagate     : 3Gbps  (I/O data-transfer rate, max) ??
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by:andyalder
andyalder earned 920 total points
ID: 38723123
300Mbps = 3Gbps because of the 8B/10B line encoding, to send 8 bits over the wire it is encoded into 10 bits. Same applies to many serial/parallel encodings, gigabit Ethernet has a clockrate of 1.25GHz for example. The max transfer rate isn't that important since the disk is nowhere as fast as the interface speed.
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Author Comment

by:sunhux
ID: 38724243
The HDD model that comes with X220 our corporate get is
actually HTS723232A7A364 :
  http://reviews.cnet.com/laptop-hard-drives/hitachi-travelstar-z7k320-hts723232a7a364/4507-9997_7-34207790.html

Track-to-Track Seek Time 1 ms
Average Latency 4.2 ms

Shock Tolerance 225 g @ 1ms half-sine pulse (operating) / 1000 g
@ 1ms half-sine pulse (non-operating)
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