- Hitachi 2tb internal hard drive mac os x#
- Hitachi 2tb internal hard drive full#
- Hitachi 2tb internal hard drive code#
Show below is a performance graph across the full capacity for a 1/2/4 drive RAID 0 stripe volume (2TB, 4TB, 8TB).
Note also that the entire first terabyte ranges in speed from 130 to 110MB/sec, faster than the fastest performance of fast 1TB drives. To put that in perspective, today’s fastest 1TB hard drives typically have a maximum performance of around 110MB/sec. The spikes at the very end should be ignored: a totally full hard drive is never advisable the very end behaves strangely (bad block remapping, etc), this is true for all hard drives.Īverage write speed across the volume was 104.73MB/sec, read speed was 105.2MB/sec (all hard drives slow down from the outer to inner tracks, as the graph shows). The DiskTester fill-volume test measures the performance across the entire volume to great accuracy, showing even the stepping effect across the drive. It translates directly to performance using a Photoshop scratch volume, backing up, copying files, opening huge images, etc.
This test represents the most important drive characteristic for a capacious hard drive: sustained transfer rate. MPG discussion of OWC Thunderbolt 3 Dock DiskTester 'fill-volume' PERMALINK This test takes 12 hours for a fast 2TB drive! After the volume is filled, all files are read, to characterize read speed vs write speed (usually very close). The DiskTester fill-volume command fills any volume with 1000 equal-sized files, written in 32MB chunks for maximum performance. For the single-drive test, two units were tested and found to be identical in performance to a fraction of a percent.
Hitachi 2tb internal hard drive mac os x#
Test results for Deskstar 7K2000 PERMALINKĭrives supplied by OWC were tested with a Mac Pro Nehalem 2.66GHz 4-core on Mac OS X 10.6.1 Snow Leopard, using the internal SATA ports. For true server environments, the A7K2000 should be used. The Hitachi 7K2000 is rated for 24X7 use (always on), but not necessarily extreme duty, which would mean intensive use 24 hours a day, not likely for 99.99% of the Mac Pro users out there. Installing four 7K2000 drives into a Mac Pro means 30 watts at idle, not insignificant, the savings by using lower power and lower performance drives might amount to 15 watts, not much in the context of a 160-300 watt Mac Pro. The 7K2000 7200 rpm spin rate draws 7.5 watts at idle, which is 50-60% more than consumer-grade drives spinning at slower speeds: performance demands a higher spin rate.
It also has a typical 32MB onboard memory cache. Unlike the previously-reviewed consumer grade 2TB drives, the Hitachi Deskstar 7K2000 spins at 7200rpm, which yields higher maximum and average performance, as well as reduced latency. The actual amount of storage hasn't changed, only a decades-long definition terabyte (TB).īefore you get too excited about that amount of storage, make sure you have a robust backup strategy if you have even 1TB of data, what would losing it all mean? How long to backup and restore it? It takes about 6 hours just to read that much data, let alone simultaneously write it somewhere else (eg to a backup). Capacityįormatted on a Mac, the resulting volume offers 1.82TB of storage (TB = 1024^3), which Mac OS X 10.6 Snow Leopard now displays as 2TB (1000^3). While the enterprise model is desirable, its advantages appear to be modest, and for most users, the price difference will quickly decide the issue. possibly more consistent performance across samples.Lower power consumption (5.6W vs 7.5W) at idle.The enterprise Ultrastar A7K2000 model offers a few features including:
Hitachi 2tb internal hard drive code#
The two drives are visually distinguishable only by the product code on their labels, and almost certainly share most of the same parts. The 7K2000 has an enterprise-grade sibling ( Ultrastar A7K2000) for about twice the price. Background PERMALINKĪt about $199 (October 2009), the Deskstar 7K2000 is a bargain for a high-performance 2TB drive, a fact which should drive down pricing on the consumer-grade alternatives, which are priced similarly, but with lower performance. There is also an enterprise-grade sibling, the A7K2000, more on that below. You can’t go wrong with the Hitachi Deskstar 7K2000- it’s a quiet, fast, and low-power offering at a very reasonable price. The test results graphed below show outstanding performance, among the fastest I’ve seen in a 7200rpm SATA drive as October 2009. More “serious”, because the unit spins at 7200rpm, thus offering even higher performance than the previously-reviewed consumer-grade Seagate Barracuda LP and the Western Digital Caviar Green, or even the “green power” Western Digital RE4-GP. The Hitachi Deskstar 7K2000 is one of a crop of more serious 2TB drives.
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