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questions about raid

C

Corporate Thug

Lifer
1. do both HDDs have to be same size, brand, rpm, and cache?
2. in what aspect does raid improve performance? in other works does in help in encoding, gaming, etc...?
3. what is the difference between raid0 and raid1 or any other raid#?

thanx
 
1: No, I dont think any RAID would require this, exept it would definetally help with RAID1.

2. RAID 1 definetally doesn't go as fast as single drive or RAID 0. RAID 1 (I think) goes as or almost as fast as single drive configs. RAID 1 uses data stripping.

3. RAID 1 is for performance RAID 0 is for reliability. other RAID setups aren't all that common in personal use though alot of people today use 1+ 0.
 
Originally posted by: KillaKilla
1: No, I dont think any RAID would require this, exept it would definetally help with RAID1.

2. RAID 1 definetally doesn't go as fast as single drive or RAID 0. RAID 1 (I think) goes as or almost as fast as single drive configs. RAID 1 uses data stripping.

3. RAID 1 is for performance RAID 0 is for reliability. other RAID setups aren't all that common in personal use though alot of people today use 1+ 0.
Click to expand...

You have 1 and 0 confused.

RAID-0 is striping(not stripping, that's an entirely different thing 😉 ), you'll get the full capacity of both drives(2x120 GB in a 0 config will be 240 GB usable space). If one drive goes bad, all the data is lost.

RAID-1 is mirroring, read speeds will improve since you can read from both disks at the same time, writes will be the same as, or marginally slower than one drive, you'll lose half the space due to mirroing, but if one drive goes bad, you'll still have the data.

Neither will effect in-game FPS and such, since that's bound by things such as CPU speed, GFX card, etc, they'll likely improve load speeds between levels and such.
They'll improve load speeds of just about anything for that matter.

As for drives, you can mix and match pretty much any way you feel like, for example a 7.200 RPM 9 GB drive and a 15.000 RPM 72 GB drive will work fine in RAID-1, but you'll only get 9 GB usable space, the rest on the 72 gigger will be wasted, and of course it won't be as speedy as 2x15K RPM.
 
Originally posted by: Sunner
Originally posted by: KillaKilla
1: No, I dont think any RAID would require this, exept it would definetally help with RAID1.

2. RAID 1 definetally doesn't go as fast as single drive or RAID 0. RAID 1 (I think) goes as or almost as fast as single drive configs. RAID 1 uses data stripping.

3. RAID 1 is for performance RAID 0 is for reliability. other RAID setups aren't all that common in personal use though alot of people today use 1+ 0.
Click to expand...

You have 1 and 0 confused.

RAID-0 is striping(not stripping, that's an entirely different thing 😉 ), you'll get the full capacity of both drives(2x120 GB in a 0 config will be 240 GB usable space). If one drive goes bad, all the data is lost.

RAID-1 is mirroring, read speeds will improve since you can read from both disks at the same time, writes will be the same as, or marginally slower than one drive, you'll lose half the space due to mirroing, but if one drive goes bad, you'll still have the data.

Neither will effect in-game FPS and such, since that's bound by things such as CPU speed, GFX card, etc, they'll likely improve load speeds between levels and such.
They'll improve load speeds of just about anything for that matter.

As for drives, you can mix and match pretty much any way you feel like, for example a 7.200 RPM 9 GB drive and a 15.000 RPM 72 GB drive will work fine in RAID-1, but you'll only get 9 GB usable space, the rest on the 72 gigger will be wasted, and of course it won't be as speedy as 2x15K RPM.
Click to expand...


why should raid1 have better read speeds?
if you are using the same drive, the both drive holds the same data
 
Originally posted by: KillaKilla
1: No, I dont think any RAID would require this, exept it would definetally help with RAID1.

2. RAID 1 definetally doesn't go as fast as single drive or RAID 0. RAID 1 (I think) goes as or almost as fast as single drive configs. RAID 1 uses data stripping.

3. RAID 1 is for performance RAID 0 is for reliability. other RAID setups aren't all that common in personal use though alot of people today use 1+ 0.
Click to expand...

Get your facts straight before you try to help someone.
rolleye.gif
 
You'd need a RAID card (don't know if there's one built into your mobo) and then two drives (preferrably the same model, size, etc.). Once you physically install the drives, then you use the RAID card's BIOS to set up the RAID array. It's pretty easy to do (appeared that way with the Silicon Image SATA controller on my mobo). I don't know about the Intel southbridge integrated RAID though.
 
why should raid1 have better read speeds?
if you are using the same drive, the both drive holds the same data
Click to expand...
Cause you can read from both drives, you don't need to duplicate reads.

I guess I forgot to mention that I meant "improve compared to a single drive" not compared to RAID-0, which will increase reads and writes.
 
1) Your motherboard's SATA controller is RAID capable. You will need to get 2 SATA drives to use it though.
2) After hooking them up, make sure that the contoller is set in the BIOS of your computer to run in RAID mode.
3) There will be a BIOS message from the RAID controller that will come up (press CTRL-S to enter RAID setup, or something similar to that). Enter that setup.
4) It will show you both drives. Tell it to use them in a RAID 0 array, and it will want to reboot.
5) Reboot. The RAID array is active. To install windows onto it, you'll have to give Windows Setup a disk with drivers for the RAID controller. If you aren't installing Windows, just let it boot. the RAID array will be there, after you format it. Windows will look at it as if it's a single drive.
 
Originally posted by: saltedeggman
0 for performance
1 for secuirty
0 + 1 = performance + secuirty
Click to expand...

Correction:

0 for performance with less security than normal non-RAID. Actually, it is a misnomer since it defines an Array of Inexpensive Disks but is not redundant but rather is anti or negatively redundant. Therefore the implied equation is false since RAID 0+1 actually increases security over normal rather than just restoring it to normal.

 
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