Opened 12 years ago
Closed 8 years ago
#11660 closed defect (obsolete)
Weird performance of rawdisk on SSD
| Reported by: | sochan | Owned by: | |
|---|---|---|---|
| Component: | virtual disk | Version: | VirtualBox 4.2.10 |
| Keywords: | ssd performance rawdisk | Cc: | |
| Guest type: | Linux | Host type: | Windows |
Description
Hello there, how do yu feel this fine day?
I've started using my SSD partitions as rawdisk through vmkd image and everything works fine but HD Tune reports really weird performance bencharks results.
The SSD shows it's true speed only after 3/4ths of the test is already done. For the most part it hangs around 100MB/s then at around 80% suddenly spikes to 250MB/s. The attached screenshots document that. Access times are fine. This happens no matter how many times the test is repeated.
This very well might be a problem with how HD Tune does things but I do find it weird.
Attachments (5)
Change History (7)
by , 12 years ago
| Attachment: | hdtune_ssd_01.png added |
|---|
by , 12 years ago
| Attachment: | hdtune_ssd_04.png added |
|---|
example of a hdtune test(the one from which VBox.log comes from)
comment:1 by , 11 years ago
Could be that the benchmarking software uses the wrong sector size... VirtualBox doesn't really know what the optimal sector size is, and thus it reports 512 bytes.
comment:2 by , 8 years ago
| Resolution: | → obsolete |
|---|---|
| Status: | new → closed |
Please reopen if this is still relevant with a recent VirtualBox release. There were quite a few I/O related fixes/optimizations since the tested release.
example of a hdtune test