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Multiple RAID setups on partitions

Tags:
  • NAS / RAID
  • Hard Drives
  • Storage
Last response: in Storage
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March 7, 2008 6:36:28 PM

Hi All

1) This is not a show off session
2) This is not a theoretical question, as I need to set this up tomorrow
3) This is for private and not business use

Technology used
- Windows XP software raid (Hacked)
- 4 X 160 Hitachi HDD - IDE - (2003 & 2004 models)
- 4 X 320 Seagate 7200.10 HDD - SATA - (2006 models)
- 4600+ AMD 939 chip

Step 1
- Partition Seagate HDD's in 20, 140, 160 partitions each
- 2 X 20 Gig partitions used in RAID 1 - OS
- 2 X 20 Gig partitions used in RAID 0 - Swap file

Step 2
- 4 X 140 Gig partitions left as sepearate partitions

Step 3
- 8 X 160 Gig partitions in Raid 5 used for storage

Question
If you have used Windows XP Pro RAID functions, lease indicate the possible pitfalls which could be expected in the setup.

Regards

Druedd

More about : multiple raid setups partitions

March 7, 2008 8:28:39 PM

Good Luck






March 7, 2008 9:01:32 PM

druedd said:

1) This is not a show off session
2) This is not a theoretical question, as I need to set this up tomorrow
3) This is for private and not business use


Why would you do this type of a raid setup ?
Related resources
March 8, 2008 3:21:44 AM

Hi All

This setup started out as two machines with Raid 0 arrays on 2 machines consisting of 4 drives each. This was a successful setup with no problems over the period. Both the machines were used for gaming purposes and the rigs were built for purpose.

The processor on the one machine has become unreliable as it ran during the gaming activities at 100% performance for extended periods (6 to 12 hours at a time).

This rig was stripped and the components carried to an existing rig, which will now fulfill a dual purpose, being gaming and storage. The 160 Gig HDD's has become a risk as well as I had to solder back some of the circuits on two of the disks already. (IDE interface at the back of the disk was damaged while testing PATA to SATA converters to get all 8 disks on SATA. These converters did not work and damaged the drives.

The next anticipated questions:

1) Why not use a raid 5 card
* Cost impact of obtaining one is a bit high as the HDD has become less reliable and will be replaced by SATA drives
* I am busy replacing the 160 Gig Hitachi's (IDE)with 500 Gig Seagate 7200.11(SATA)
* The MOBO only has 1 PCI slot which is covered by the PCI-e Card as it fills two slots so no expansion is possible
* The Windows Raid array can be carried to another system without any limitations with regards to the controller.

I think the biggest reason is....

I like to make my life as difficult as possible??

Thanks

Druedd

a b G Storage
March 8, 2008 5:58:51 AM

1) that many hdd's in raid0 and that old is just asking for problems
2) windows raid arrays (software) aint so great
3) you cant install windows onto the raid partitions created by windows
4) raid5 = cpu overhead, capping your gaming even perhaps
5) seek times become an issue with that many hdd's AND the software raid more (software software - windows)
6) the 20gb hdd's are most likely 5400rpm, 2mb cache
7) windows software raid1 and raid5 - if your system resets it will have to rebuild that whole partition again

the gain you will see from all this will be pitifal, perhaps slower then a single hdd setup, and the hassle, not worth it.

Buy your self some WD Raptors, even then you shave 1 second from the loading time ;) 
March 8, 2008 1:30:47 PM

The two major problems were just mentioned:

1. You can't boot off Windows software RAID. So your OS partition can't be RAID anything.

2. Hacked WinXP RAID 5 is not reliable at all. It will occasionally drop the array for no good reason.

Motherboard RAID and software RAID are OK for a quick 2-drive RAID 0 or RAID 1, but if you're wanting to hook up 8 drives you need an actual decent RAID card.
March 9, 2008 8:44:26 PM

Hi All

Thanks for the advice. The result is as follows:

2X 320 Gig Seagate 7200.10 - Sil3112 Raid 0 partitioned as 50gig (OS), 154gig (raid 5 disk) and 394gig(other)

2X 320 Gig Seagate 7200.10 - Sil3132 Raid 0 partitioned as 50gig (Swap), 154gig (raid 5 disk) and 394gig(other)

4 X 160 Gig Hitachi - 4 disks in Raid 5 array

Resulting in 6X160 gig partitions (dynamic disks) for Raid 5 Array

OS backup by Ghost 2003.

I will run this for a while to see whether it is stable before committing critical data to it.

Regards

Druedd
March 10, 2008 3:07:10 AM

Honestly, you can pick up a really good RAID card for around 200... which I'd have to advise with all the RAID setups you're doing.

Let us know, but I'd think that setup's going to have a very high system resource overhead.
a b G Storage
March 10, 2008 8:17:16 PM

druedd said:
Hi All

Thanks for the advice. The result is as follows:

2X 320 Gig Seagate 7200.10 - Sil3112 Raid 0 partitioned as 50gig (OS), 154gig (raid 5 disk) and 394gig(other)

2X 320 Gig Seagate 7200.10 - Sil3132 Raid 0 partitioned as 50gig (Swap), 154gig (raid 5 disk) and 394gig(other)

4 X 160 Gig Hitachi - 4 disks in Raid 5 array

Resulting in 6X160 gig partitions (dynamic disks) for Raid 5 Array

OS backup by Ghost 2003.

I will run this for a while to see whether it is stable before committing critical data to it.

Regards

Druedd


Did you listen to anyones advice?
!