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When using the SQLIO benchmark tool on a 4-core Dell server with 6 15k 450GB (fast) drives, RAID 0, we found the max throughput was 2MB per second. But when configured as RAID 5, we get 30 MB per second.
It seems that the RAID controller, Dell Perc 5i...
Started by markn on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
RAID 5 also spreads but isn't terrible....
RAID 0 stripes across all the drives so parts of the data you are writing will end up spread across the 6 disks.
RAID 0 write speeds should be significantly faster than RAID 5.
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Yes, this is on of those "do my job for me" questions, have some pity:)
I'm at the limit for what I can do with the number of hard drives in a server without spending a substantial amount of money. I have four drives left to configure, and I can either...
Started by Boden on
, 7 posts
by 7 people.
Answer Snippets (Read the full thread at serverfault):
(ie disk fails, raid rebuilds, disk, can survive (in the....
With either scenario, except with raid 10 if you happen to lose the wrong 2 drives then you'll have a real occur over enough time for the raid to rebuild between failures.
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I have Dell Poweredge server 2600 with Raid 5 in 3 hard drive Scsi 36gb each, it was fail to boot sinc the third drive is offline.
I attached Sata card adapter to Sata hard drive and install OS SERVER 2003 to it, downloaded drivers for Raid and everything...
Answer Snippets (Read the full thread at serverfault):
And the boot from the Win-PE-CD with your RAID....
Just simple disks.
When I read (quick overview, 5 sec.) the webpage on "RAID Reconstructor" right, you'd put these three disks into a computer with no RAID-controller attached.
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Ask your Facebook Friends
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Mdadm does not seem to support growing an array from level 1 to level 10.
I have two disks in RAID 1. I want to add two new disks and convert the array to a four disk RAID 10 array.
My current strategy:
Make good backup. Create a degraded 4 disk RAID ...
Started by Hans Malherbe on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at serverfault):
0) Backup, Backup, Backup, Backup oh and BACKUP
1) Make the new array:
mdadm -v --create /dev/md1 --level=raid10 --raid-devices=2 /dev/sda1 /dev/sdb2
2) Mount the raid....
With linux softraid you can make a RAID 10 array with only two disks.
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I witnessed an argument today between two friends, one was claiming that raid 5 offers the same speed increases as raid 0 with the safety of parity... The other one was saying it was slower then a single drive due to the parity calculations im just wondering...
Started by Woodstock on
, 13 posts
by 8 people.
Answer Snippets (Read the full thread at bit-tech):
Yeah expensive) raid 5....
The advantages of RAID 5 outweigh the disadvantages to me.
RAID 5 will be a bit slower, simply because there are more operations to do to write any data data and doing parity calculations.
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I'm using a hardware HP RAID controller. My server came with one 250GB drive. I purchased three additional 250GB drives with the intent of having one as a cold-spare.
I put the two additional drives in the server and powered it up. I went into the BIOS...
Started by DWilliams on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at serverfault):
As others have said and you have witnessed by "All I can choose is 0, 1, and 10." You... .
Sometimes they will be a 'light controller doesn't support RAID 5.
It's possible that your RAID controller does not support RAID 5.
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Our RAID controller failed; it doesn't show up with a boot menu anymore, and the BIOS finds no disks. When we get a new controller, can we recreate the RAID set without losing data? IIUC, the controller has the configuration in RAM, not on disk (and yes...
Started by Martin v. Löwis on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at serverfault):
The controller should just read that information, but that is the case with the Dell... .
Generally RAID information is stored on the disc, but get the exact same raid controller.
A copy of the data the world won't end if it all gets lost.. .
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Hi all,
I have a Dell 2950 with 6 disks, I'd like 2 RAID 5 arrays 3 disks in each array. The RAID manager only allows me to create 1 array, after the array is created I can't create another. Why would this be?
PS I'm going to install Exchange 2010 on ...
Started by Steven on
, 6 posts
by 6 people.
Answer Snippets (Read the full thread at serverfault):
For MS Exchange, it is recommendable to stay away from parity RAID....
If youUsually most RAID controllers allow multiple arrays, that's weird.
X300GB (+1 hot swap) Raid 5
I'd get on the horn w/your AM at dell or tech support.
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Possible Duplicate:
Expand Windows Server 2008 RAID 5 array
Hello there!
Is there any way to extend my Windows Server 2008 R2 software RAID5 volume by another drive or am I bound to recreate that volume from scratch?
Thanks for your attention.
Started by Artem Tikhomirov on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at serverfault):
Create a RAID 5 array this is possible with Windows software RAID but you could take the guesswork out of it with a little no-risk.
Create a virtual machine with a bunch of virtual drives .
Experimentation.
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I want to use a software raid on a Linux server I am creating. I have 2 identical Maxtor 250 GB hard drives and one Western Digital 250GB hard drive. I know I know I can easily set up raid 1 with the 2 Maxtor drives, But is there a way I could use the...
Started by mrlanrat on
, 7 posts
by 7 people.
Answer Snippets (Read the full thread at serverfault):
GB drives will allow you to have RAID 5 array, granted it's nicer to have all the same drives isues mixing disk vendors, Linux software raid is discussed pretty thoroughly here , you shouldn't have special requirements to the ....
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