Questions which refer to software RAID implementations.
7
votes
3answers
2k views
Will mirroring with an SSD improve read performance?
If you use Windows 7 to mirror a volume across an SSD drive and a mechanical hard drive, will the read performance be similar to a single SSD drive?
I.e. is Windows smart enough to read from them ...
0
votes
2answers
2k views
Is it possible to enable software RAID 1 on Windows XP system partition?
I have heard, that it should be somehow possible to use just one partition with Windows XP, and be able to mirror that by enabling RAID 1 in XP. I'd appreciate tips how to do this.
If this is true, ...
0
votes
0answers
53 views
Windows 7 Raid - Drives can't see each other
I'm trying to stripe two drives using the disk management tool. Both partitions give me the option to stripe them but when I use the wizard the other drive doesn't show up to allow me to raid to it!
...
0
votes
3answers
339 views
RAID-1 in RHEL 6; can't get partitioning on identical devices to look identical
I have a RHEL 6 fileserver. It contains two identical 2TB SATA drives. Both are supposed to contain one partition that takes up all the space on the drive (and this used to be the case). When I had ...
0
votes
1answer
346 views
Update grub for whole disks added to software raid
I have a raid-1 running under rhel6 (/dev/md0) that is mapped to /. It contains two unpartitioned disks (/dev/sda and /dev/sdb). I'd like to be able to boot from either disk. But grub won't let me ...
1
vote
1answer
421 views
Adding disk to windows-7 RAID-5
If I have a 3-disk RAID 5, and I want to add a 4th disk to the RAID, can this be done without moving all the data out of the existing raid array and rebuilding it as a 4 disk raid-5 array?
4
votes
3answers
392 views
Several questions about software and onboard RAID 5
I have a few questions on how software and onboard RAID 5 compare:
Is there any way to add a disk to an existing RAID 5 array using either software or onboard RAID?
All motherboards I'm interested ...
2
votes
1answer
2k views
Sharing an Intel RST between Windows and Linux
I have an Intel z68 motherboard, which makes use of Intel Rapid Storage Technology (RST) -- Version 10.5. If possible, I'd like to split my RAID 1+0 RST drive equally between a Linux and Windows ...
0
votes
0answers
201 views
Reformat soft RAID-5 Ubuntu
I built a linux (Ubuntu) box a year ago and decided to have some fun and use a soft RAID 5. I followed the instructions here.
Things seemed to work fine, but now it's time to reformat the computer ...
13
votes
7answers
6k views
Onboard RAID vs Software RAID
My motherboard, an Asus M4a79t Deluxe, advertises RAID 0/1/5 capabilities. My limited understanding is that onboard RAID is better than software RAID. Is this necessarily true? Is an onboard RAID ...
0
votes
1answer
325 views
How to remove swap partitions from RAID 1 Array on Ubuntu?
Can anyone point in the right direction on how to remove SWAP out of a RAID1 configuration on Ubuntu 10.04 server? According to the Ubuntu Advanced installation guide, here, it said to add swap to the ...
1
vote
1answer
724 views
Why do motherboard manufacturers continue to include fake RAID? [closed]
Windows 7 is becoming ubiquitous and offers a simple software RAID solution within the OS. Modern desktop Linux distros have good software RAID capability as well.
But mid to high end motherboards ...
0
votes
1answer
214 views
Windows 7 Mirroring Drive Failure
I had a few questions when a drive fails that is setup with software RAID 1 in Windows 7, e.g. Dynamic disk mirroring:
Will it still boot using the good drive (assuming boot drive is RAID 1), or ...
1
vote
1answer
2k views
Performance of RAID 5 with mdadm
I have set up a software-raid 5 with mdadm on a 1.3 GHz AMD Neo 36L dual core machine using 3 1.5 TB Seagate Barracude Green drives (4k sectors). The chunk size of the raid is 512 KB. On top of the ...
3
votes
1answer
147 views
I'm trying to mirror drives of the same model, but one appears to be slightly larger
I'm trying to mirror a drive using Disk Management in Windows Home Server 2011. The target drive (Disk 1) is the exact same model as the source drive (Disk 0), but the target drive appears to be 1MB ...
10
votes
1answer
4k views
Can I setup a software RAID in Windows 7 using Virtual Hard Disks?
Well, the title of my question pretty much sums it up, but let me elaborate. The main idea of what I want to do is as follows:
1) I have two separate hard disks, with nearly equal performance. I use ...
0
votes
1answer
236 views
How can I deal with a full striped volume?
I created a striped logical volume in Windows 7 x86 that is across 3 x 2TB drives. It's almost completely full, and I smacked my forehead when I realized today that you apparently cannot add drives to ...
1
vote
2answers
531 views
Can I configure a partition of a drive to use RAID0 and still use the left over partition for storage?
I want to set up a RAID0 configuration. I only have a 80 GB drive and a 750 GB drive. I was hoping to only RAID 80 GB of the 750 GB drive so that it would match the 80 GB drive. I heard that this may ...
0
votes
3answers
619 views
Software RAID0 with drives of drastically different sizes
Is it at all possible to do a software RAID0 (with Ubuntu Server, installing Crunchbang on it though) with drives of drastically different sizes? One of the drives is 250GB while the other is 60GB.
11
votes
11answers
54k views
What's the difference between RAID 1 software mirroring and Fake RAID?
I've just ordered two new hard drives for my main desktop and a copy of Windows 7 Professional 64-bit. I'd like to do a clean install of Windows 7 onto the new drives (leaving my old Windows XP ...
0
votes
1answer
302 views
Possible to load old software raid array on new system? Ubuntu
I am looking into a more redundant solution to my home server.
I know raid is "not" a backup, but I am looking into a raid 5 solution for these reasons.
I would be very annoyed if I lost my data, ...
1
vote
2answers
342 views
Where is the Missing Disk Space on Linux Software Raid
Purchased (4) 2TiB Drives (actual disk space) and created a RAID5 array expecting to have 6TB of useable disk space, however actual useable space is 5.46TiB.
So, the question is where did the disk ...
4
votes
4answers
939 views
Software RAID on dual boot Windows and Ubuntu
Can I successfully implement a software RAID even when I use both Windows and Ubuntu?
What software tools in both OSes that can help in this regard?
I have 1TB sata on ASUS m4a78T-E and I wish to ...
4
votes
2answers
718 views
P4 vs. I3/i5 *T in power consumption and performance
I am running an Intel P4 prescott with HT on my home server (linux file server on encrypted disks on software-RAID5 and virtualisation host for three further machines). The performance for this ...
1
vote
2answers
256 views
looking for a solution for a Software Raid on my XP computer
Recently, I purchase 2x1TB drives for my XP computer, I want to use RAID 1 for the redundancy, but the motherboard is little old and can't support that. Some articles introduce how to make it happen ...
12
votes
2answers
4k views
combining SSD and hard disk in software RAID1?
Does it make sense to build a Linux software RAID-1 (mirroring) using an SSD and a normal hard disk? I want to combine the advantages of SSD (fast transfer rates, fast access times) with the ...
1
vote
1answer
580 views
Recover Linux software RAID5 array after server upgrade
I recently upgraded a server from Fedora 6 to Fedora 14. In addition to the main hard drive where the OS is installed, I have 3 1TB hard drives configured for RAID5 (via software). After the upgrade, ...
4
votes
2answers
285 views
Harddrives to NAS
Is it wise to go for same brand/model for all the drives in a NAS, or is it ok to mix?
What about mixing between different raid groups?
0
votes
1answer
73 views
backuppc - will it work with flexraid (or similar)
Will backupcpc work with flexraid?
What I do know is Backuppc must run under linux because of the hard links it uses, which means the file system I believe has to be a certain type other than ...
0
votes
1answer
524 views
Software RAID performance/limitations in degraded mode
Trying to polish the final fine details of software RAID mission critical home-server solution. I am curious about the server performance in RAID-1 (mirroring) degraded mode (where one of the hard ...
2
votes
1answer
320 views
Software RAID and backup altogether
In this thread I've got most valuable tips regarding the home RAID solution options as well as their pros and cons:
RAID for home use
I've figured out for myself a few important points (the ...
4
votes
3answers
2k views
Hardware RAID - what happens if the motherboard or controller fails?
I want to set up a RAID 5 array in a machine that has an intel motherboard. It has built in raid (sata). My concern is what happens if the motherboard fails?
How can I take those hard drives ...
2
votes
1answer
242 views
Recover from failed recovery of software RAID5 failure
I have the pleasure ;-) to have been handed the task to try to get data off a server that had a RAID5 array problem and a failed attempt to recover it.
Background: the computer in question is some ...
10
votes
2answers
5k views
Does software RAID 1 in Windows 7 improve read speeds?
Does software RAID 1 (mirroring) in Windows 7 improve read speeds?
I'd like to set up RAID 1 to help protect my important documents (yes, yes, I know it's not a backup), but performance is also ...
1
vote
1answer
138 views
OK to use Windows while a RAID array is building?
I've just put together a nice clean, fresh install of Windows 7 x64, and my two primary harddisks are building a software RAID1 array in the background while I type this.
But I want to move over ...
1
vote
1answer
89 views
Help with my RAID config
I've got a 250GB SATA2 hard drive. Yesterday I boughy myself a pair of 1TB HDDs which I intend to put into a RAID-1.
If I enable the RAID functionality in the BIOS, I can setup the two drives in a ...
1
vote
2answers
348 views
Re-Initialize RAID-0 in software after card failure
I'm working on a Friend's WD MyBook "1TB" HDD that is not mounting. When I got in to it, I discovered that it is really 2 500GB HDD's set up as RAID-0. It appears that the drives themselves are ...
0
votes
1answer
44 views
What is the tolerated performance difference between HDDs?
I got a server with software RAID1 and two identical HDDs. Using hdparm -tT I get sligthly different results, one gives me 100Mb/s and the other one 97Mb/s. Is this difference tolerable in this ...
1
vote
1answer
1k views
Auto-rebuild RAID6 with MDADM
I have an openSUSE 11.3 Linux computer with 5 disks of 1TB (WD enterprise disks) in it. With mdadm I configured a RAID6 device.
Now, after a lot of thorough testing, I've noticed that when the ...
1
vote
2answers
468 views
Commercial NAS RAID1 disks moved to Software Raid system?
I've got a couple of commercial NAS boxes and I'm wondering if they (ReadyNas duo, DLink DNS-323) or any other NAS is suitable for having their RAIDed disks moved to a software-based NAS. To be ...
0
votes
2answers
268 views
Redundant storage of select files and synchronization between multiple computers
Historically, I've manually copied personal files onto multiple hard drives periodically to keep them backed up, but I just emptied my wallet getting certain files that were only stored in one place ...
2
votes
1answer
780 views
external drive enclosure -> software RAID 5?
I have two older PCs on my LAN posing as 'servers'; one running FreeNAS off a USB stick using three 500GB HDDs in a ZFS RAID-Z pool serving as storage for the LAN and one running Debian Lenny with an ...
1
vote
1answer
869 views
Should I include my OS partition on my RAID or separate hard drive?
I plan to build a Linux (Ubuntu 10.04) home file server soon with 3-5 x 2TB hard drives in RAID 5 software raid but I'm not experienced with setting up RAIDs.
Should I include the actual Linux host ...
0
votes
3answers
3k views
Software or Hardware RAID for Home Server?
Now I have searched Server Fault and Super User and have seen that some people recommend software and some people swear by hardware RAID, but I am looking to use it on a home server of mine to store ...
2
votes
2answers
11k views
How to install Windows 7 onto software RAID-0
I recently got a new laptop (Asus G73JH-A2) which has two identical hard drives in it. Unfortunately the motherboard does not have a RAID controller. What I would like to do is run the drives in a ...
0
votes
1answer
252 views
What would happen in a Software Raid 1 of one HDD and one SSD?
I'm running my Windows 7 installation and all of my apps from an SSD for performance reasons. Since SSD's can instantly die at any moment, I'm looking for some kind of data backup strategy. Right Now ...
0
votes
1answer
144 views
Replace mainboard without damage software RAID
I am currently using software RAID on Ubuntu 10.04.
Since my mainboard only supports DDR2, I want to replace it with another one. However, I'm worry about the software RAID damaged.
Will the Ubuntu ...
2
votes
1answer
180 views
Does Mac OSX software raid support partial resync?
If I have a software RAID-1 (mirror) setup in Mac OSX and I turn off the system during mirror rebuild, when I turn it back on will it start a whole new resync or just do a partial resync (like linux' ...
2
votes
2answers
2k views
Raid 1 mdadm (linux) disk failure recovery: DRDY err (UNC) keeps repeating can't reach login
Over the weekend, I got several emails from our network storage server (just a custom box with CentOS 5 and 2 2tb drives software raid 1) indicating SMART detected issues with one of the drives.
I ...
2
votes
1answer
492 views
Software RAID 5 with Multiple Partitions (one encrypted partition)
Can I have multiple partitions using Software RAID 5 on an Ubuntu Server?
For example, say using a 4 drive RAID 5 setup, I want one massive partition for storage and a second smaller but encrypted ...
