Kevin OBrien

Hitachi Deskstar 7K4000 Review Discussion

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Much like its enterprise sibling, the new Ultrastar 7K4000, the Deskstar 7K4000 allows desktop and prosumer customers to increase data densitiy, lowering the cost of storage per gigabyte without increasing the physical footprint or adopting a new interface or enclosure. The 7K4000 offers the largest capacity currently available in a standard 3.5-inch hard drive, with a 6Gb/s SATA interface and 64MB cache that make it very competitive against other high-capacity drives on the market. The Deskstar 7K4000’s green features include a halogen-free design, Extended Power Conditions, and eighth-generation power management technology with HiVERT.

Hitachi Deskstar 7K4000 Review

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CrystalDiskMark 500MB fastest/slowest performance results section discusses graphics reprenting MB/s transfer rates as if they were times in milliseconds and draws wrong conclusions. Or at least this it how it seems to me.

Edited by petri.kekkonen

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As with other recent Deskstar drives, Hitachi provides the integrated cache, 64MB for the 7K4000.

What does this mean? I can see a separate Samsung chip, which may be DRAM.

Maximum media transfer rate: 1638 Mbits/sec

Now that's what I call a fast HDD ;)

And the graph "IOMeter 2 MB sequential" is quite crowded, since the drives perform rather similarly. An easy way to improve readability: round the transfer rates to one significant digit less: 165.17 MB/s -> 165.2 MB/s. The last digit is probably too noisy anyway. This change could be applied to other graphs as well.

MrS

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Confusing ?!:

1) Bytes and bits

B is used for Byte

b is used for bit

"Maximum media transfer rate: 1638 Mbits/sec" <=== really is 1638 Mb/s

"Maximum interface transfer rate: 600 Mb/sec" <=== really is 600 MB/s (SATA 6Gb/s ~ 600MB/s)

2) error rate:

"Non-Recoverable Error Rate: 1 in 1014 bits read" <== 1 in 10 power 14 or 1 in 100,000,000,000,000 bits

3) Power

"Start-up: (W, peak, max) 1.2W (+5V) & 1.5 (+12V) (amps)" ???

Thanks!

MEJV

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Confusing ?!:

1) Bytes and bits

B is used for Byte

b is used for bit

"Maximum media transfer rate: 1638 Mbits/sec" <=== really is 1638 Mb/s

"Maximum interface transfer rate: 600 Mb/sec" <=== really is 600 MB/s (SATA 6Gb/s ~ 600MB/s)

2) error rate:

"Non-Recoverable Error Rate: 1 in 1014 bits read" <== 1 in 10 power 14 or 1 in 100,000,000,000,000 bits

3) Power

"Start-up: (W, peak, max) 1.2W (+5V) & 1.5 (+12V) (amps)" ???

Thanks!

MEJV

Had a little formatting error bringing the content into the admin with the 1in10 power 14.

Looks like Hitachi had a bit of a Typo on the start-up current information

Requirement: Start-up (W, peak, max) 1.2 (+5V) & 1.5 (+12V) (amps)

Guessing that probably mean (A, peak, max) given those values.

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I would like to verify, you can use this in 5V mode or 12V mode? Do we know how much slower is it in 5V mode for a single large bulk transfer?

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I just wonder were the Maximum media transfer rate of 204MB/sec appears.

Under HD Tune my drive peaks at 174MB/sec what is a pitty because I had expected this drive to be as fast as my Seagate 72000.14 that peaks around 210MB/sec.

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