Hitachi HTS725032A9A364 vs Seagate ST320LT007 - 9ZV142 : better MTBF & performance
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
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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Complete specs for that Seagate model: http://www.seagate.com/staticfiles/support/disc/manuals/notebook/momentus/Thin%20(.2)/100625253c.pdf
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) ??
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) ??
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.
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)
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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