PCMark05
For these tests, we use RankDisk, an application developed and copyrighted by Intel. In our testing, we found RankDisk to be suitable for a neutral benchmark. RankDisk is used to record a trace of disk activity during usage of typical applications. These traces can then be replayed to measure the performance of disk operations for that usage.
RankDisk records disk access events using the device drivers and bypasses the file system and the operating system’s cache. This makes the measurement independent of the file system overhead or the current state of the operating system. In replaying traces, RankDisk always creates and operates on a new dummy file. This file is created in the same (or closest possible) physical location of the target hard disk. This allows the replaying of traces to be safe (does not destroy any existing files) and comparable across different systems. Due to the natural fragmentation of hard disks over time, they should be defragmented before running these tests.
The traces used for each test were created from real usage. The traces contain different amount of writing and reading on the disk; total ratio in the HDD test suite disk operations is 53% reads and 47% of writes.
The following input traces are used:
Windows XP Startup: This is the Windows XP start trace, which contains disk activities occurring at operating system start-up. The test is 90% reading and 10% writes. This trace contains no user activity.
Application Loading: This is a trace containing disk activities from loading various applications. It includes opening and closing of the following applications:
Microsoft® Word
Adobe® Acrobat® Reader 5
Windows® Media Player
3DMark®2001SE
Leadtek® Winfast® DVD
Mozilla Internet Browser
The application loading trace is 83% reads and 17% writes.
General Hard Disk Drive Usage: This trace contains disk activities from using several common applications.
These are:
Opening a Microsoft® Word document, performing grammar check, saving and closing
Compression and decompression using Winzip
Encrypting and decrypting a file using PowerCrypt
Scanning files for viruses using F-Secure® Antivirus.
Playing an MP3 file with Winamp
Playing a WAV file with Winamp
Playing a DivX video using DivX codec and Windows® Media Player
Playing a WMV video file using Windows® Media Player
Viewing pictures using Windows® Picture Viewer
Browsing the internet using Microsoft® Internet Explorer
Loading, playing and exiting a game using Ubisoft Tom Clancy’s Ghost Recon
The General Usage trace is 60% reads and 40% writes.
Virus Scanning: Virus scanning is a critical task in today’s PC usage. As the major bottleneck of scanning viruses is in hard disk activity, it is reasonable to include virus scanning as a HDD test. The test consists of HDD activity of scanning 600MB of files for viruses. The Virus Scanning test is mostly disk reading (99.5%).
File Write: This trace contains disk activities from writing 680MB files on the hard disk and no read operations are involved in this test.
Disk idle times have been compressed to 50 milliseconds to speed up the playback time. Our studies showed that 50 milliseconds was the smallest idle time interval that didn’t affect the test results. The results of the HDD tests are reported in Megabytes processed per second.
Here we see the Caviar Black doing well, but only under the ICH10R. With half the available throughput, the ICH seems to be the better controller for this new drive.
In a puzzling twist, the uncached Marvell scores crazy high in the Virus Scan test, while the cached one turns in the lowest score of this group. At least write speeds stayed relatively matched across all three controllers.
I find it odd that the author
I find it odd that the author chides Marvell for the interface performance: in effect doubling the Windows O.S. for transference.
I am bewildered he then goes on to say that the 2TB Drives are faster, but perhaps, should be equalled by the WD1002FAEX.
If the Marvel controller were saturating on the Motherboard, it probably would similarly saturate for the 2TB Hard Disks. Assuming that the OEM PC and the Windows O.S. have not changed, this particular difference must lie within the testing of the WD1002FAEX.
[While it is alleged that] Marvell’s 88SE9123 or 88SE9128 controllers have not been able to deliver improvements to 3GB/sec as suggested; this is partly and largely due to Marvell’s SE91XX drivers having flaws.
Some software requires
Some software requires caching to be disabled. For example, SQL Server. When the driver ignores convention, you have no choice on having a reliable system.
1.5 and 2 TB have a major and
1.5 and 2 TB have a major and minor arm whereas 1 TB has only 1
1.5 and 2 TB have a major and
1.5 and 2 TB have a major and minor arm whereas 1 TB has only 1
Have had two of these fail –
Have had two of these fail – from completely different systems. Steer clear!!