OT: Solid State Disk Speed Test Results

[Jesse]

Well, like i said before i have in my SAC system two Transcend Solid State Disks:

- Transcend 8 GB SATA Solid State Disk SLC (OS Drive) - Model:TS8GSSD25S-S (http://www.newegg.com/Product/Product.aspx?Item=N82E16820208380)
- Transcend 32 GB SATA Solid State Disk MLC (Storage Drive) - Model:TS32GSSD25S-M (http://www.newegg.com/Product/Product.aspx?Item=N82E16820208347)

The test consist of 3 Write/Read Request Sizes with 72 Tracks each, using the Hard Disk Speed Test Utility that Bob made:

- 32 KBytes / 72 Tracks
- 128 KBytes / 72 Tracks
- 512 KBytes / 72 Tracks

The following it's the 8 GB SLC Disk:

[Jesse]

And the following it's the 32 GB MLC Disk:

[Jesse]

As you can see the 32 GB MLC it seems faster than the 8 GB SLC in data test like this, but in the Trascend specs says the 8 GB SLC it's faster in Random Write access, that's why they recommend SLC disks for Operating Systems.

I hope this kind of information will be useful for you guys, if you want to jump into the SSD era :) compare this results with your current Hard Disks and post the diference here.

I think SAWStudio users will benefit a lot using this kind of disks especially for recording high count tracks or mixing 72 stereo tracks of audio at 24 bits.

Cheers :D

Jesse

[preachers]

where can i get that software?

[DominicPerry]

where can i get that software?

http://www.sawstudio.com/downloads_misc.htm - right at the bottom of the page, called HD Speed Test

Dominic

[preachers]

i think RAM will affect the result, because all the data must pass though your RAM to your hard disk.

so i'll give you guys my result

[DominicPerry]

i think RAM will affect the result, because all the data must pass though your RAM to your hard disk.

so i'll give you guys my result

A modern (Core 2) machine can move data through RAM at around 8GB/s. Not a restriction for this kind of test.

Dominic

[preachers]

considering latency problem of SAC recently, i have do some tests on my hardwares, and here are my result of hard disk, you guys could compare these results to SSD's, although it won't give helps to solve the latency problem. but it really good at recording situation

firest at my macbook pro with bootcamp, and the hard disk has changed to a 7200rpm maxtor

[preachers]

here is the last one

[preachers]

the second computer is a sever machine:

CPU: XEON 5410, Quad Core 2.33G, 12m L2 Cache, Front Side Bus Speed 1333Mhz

Motherboard: asus dsgc-dw, chips 5000x

RAM: FBD sumsung 2G, 800mhz

Hard disk:seagate st373455ss, 73G, SAS, cache 16m, 15000rpm


here is the result, at 128k and 512k, it was extremely fast!

[preachers]

the last one:


but it's a shame, with my ff800, i can't even get a 1x64 buffer setting without drop:(

[preachers]

oh, it's slower than Jesse's result, but if we do a raid with these SAS drivers, it will 2 times faster than now ~~:p

[DominicPerry]

I'm not sure how we got down this road but, latency for SAC is not influenced by hard disk transfer speeds. Only SAW is influenced by HD read and write speeds. The main things which make a difference to SAC latency are the interface drivers, the timings of the PCI bus and the various peripherals attached (see another recent thread about what a disaster a USB attached monitor can make of your rig), the speed of the processor and the Motherboard and possibly the speed of the RAM (although I doubt it) and tweaks to avoid high dpc latency.
If you can't get good performance with a FF800, then the things to look at are:
Latest drivers?
Have you done the MS patch to get FW400 off it's 100MB/s restriction and back to 400MB/s where it should be?
FW chipset - even the RME devices can be better on some chipsets
Fast CPU?
Fast MoBo?
Shutdown of unnecessary devices - e.g. Network cards which are unused.
Checking that wireless mouse and wireless networking isn't causing a slowdown - check by turning them off and if you get an improvement.
Checking CPU affinity.
Trying SAC in High Priority or RealTime modes.

Dominic

[Jesse]

the last one:


but it's a shame, with my ff800, i can't even get a 1x64 buffer setting without drop:(

Preachers,

Dominic it's correct, latency it's no affected by hard disk performance, obviously people use SSD's because they are fast, but the main reason i opted for using SSD's with my SAC rig, it's because they don't have mechanical parts like Hard Disks do, produce 90% less heat than Hard Disks and can support temperatures of 70º C (158º F).

i'm using my rig and moving it almost every day and i live in an area in Mexico where you could get 55º C (131º F) in the summer easily (desert). So for me this kind of disks it's a must.

I think you should try what Dominic says and try to tweak Windows XP too with this guide that Bob made:

http://www.sawstudio.com/downloads/windows_xp_pro_tweaks.zip

By the way, could you describe your SAC system? or is it the server machine that you describe above?

[Jesse]

Sorry, i didn't see you were using a Macbook Pro but i think Robert Randolph and others that have a Macbook Pro are helping in the other thread you opened recently :)

[preachers]

problem solved, thanks a lot~:):p:cool: