Just wondering if there are any. Do not defragment RAID 0 or RAID 5 arrays. There is no point since the RAID controller determines where the bytes are written to on the two (or more) physical drives.Any benefit you receive will be extremelty short-lived as a few writes later you will be extremely fragmented again.See, the problem is Windows sees RAID 0 as a single drive and defrags it that way. The RAID controller does not. If the RAID controller wrote data only to one drive then defragging would help.ny benefit you receive will be extremelty short-lived as a few writes later you will be extremely fragmented again. See, the problem is Windows sees RAID 0 as a single drive and defrags it that way. The RAID controller does not. If the RAID controller wrote data only to one drive then defragging would help.
http://answers.microsoft.com/en-us/windows/forum/windows_7-performance/benefits-to-defragment-a-raid-0-sas-2-disk-in/98fee97e-c656-4ba4-a44d-cfce24a3e031
In other words, the RAID controller presents a map of a logical drive, which Windows sees as a single disk. But this map is translated by the RAID controller according to its own algorithm. This is why I don't think defrag actually defrags the physical disk, but rather the logical disk.ragmentation would be the same across disks irrespective of underlying storage technology. A RAID 5 fragments exactly the same as a RAID 1 volume or a RAID 10 volume or a plain drive.
https://social.technet.microsoft.com/Forums/windowsserver/en-US/c26aa69e-d1f0-4606-b888-a294e288b192/action?threadDisplayName=windowsserver&forum=winservergen
Fragmentation would be the same across disks irrespective of underlying storage technology. A RAID 5 fragments exactly the same as a RAID 1 volume or a RAID 10 volume or a plain drive.In my perception, its safe to run defrag on both RAID 5 and RAID 1 volumes.ragmentation would be the same across disks irrespective of underlying storage technology. A RAID 5 fragments exactly the same as a RAID 1 volume or a RAID 10 volume or a plain drive.
https://social.technet.microsoft.com/Forums/windowsserver/en-US/c26aa69e-d1f0-4606-b888-a294e288b192/action?threadDisplayName=windowsserver&forum=winservergen
Also, the RAID controller will use predictive caching (if it has it) based on an understanding of the array layout, so that will work better if you have defrag. The only time you don't need to defrag is if the underlying storage medium is random access, so don't defrag your USB key, and don't defrag an SSD. The data is distributed across multiple drives so there is no start or end or beginning. 2  Writes are VERY expensive on the typical RAID 5 array. 3  Even on other RAID layouts your using up power & CPU. 4  Almost impossible to prove that defragging DOES actually improve performance.
http://serverfault.com/questions/403/should-i-defrag-my-raid-volumes
No. 1  It is unlikely you will access the data on the drive in a linear fashion. 2  The data is distributed across multiple drives so there is no start or end or beginning. 3  Writes are VERY expensive on the typical RAID 5 array. 4  Almost impossible to prove that defragging DOES actually improve performance. The data is distributed across multiple drives so there is no start or end or beginning. 2  Writes are VERY expensive on the typical RAID 5 array. 3  Even on other RAID layouts your using up power & CPU. 4  Almost impossible to prove that defragging DOES actually improve performance.
http://serverfault.com/questions/403/should-i-defrag-my-raid-volumes
It's like having them in RAID 0 causes the files to be fragmented. The whole point of using RAID 0 was to increase my transfer rates. I don't want to defrag them and find out it moved all the data onto one HD and the other is not being used at all.aid 0 is basically striping the data to two drives. When you read files off a raid 0 it pulls the data blocks from each drive and puts it together. That's the purpose of raid 0.
http://www.tomshardware.com/forum/243624-32-raid-defrag
For any OS, connected disks looks like a plain disks and any defrag application treats disk as a plain disk irrespective of disk RAID levels.ragmentation would be the same across disks irrespective of underlying storage technology. A RAID 5 fragments exactly the same as a RAID 1 volume or a RAID 10 volume or a plain drive.
https://social.technet.microsoft.com/Forums/windowsserver/en-US/c26aa69e-d1f0-4606-b888-a294e288b192/action?threadDisplayName=windowsserver&forum=winservergen
No. 1  It is unlikely you will access the data on the drive in a linear fashion. 2  The data is distributed across multiple drives so there is no start or end or beginning. 3  Writes are VERY expensive on the typical RAID 5 array. 4  Even on other RAID layouts your using up power & CPU. The data is distributed across multiple drives so there is no start or end or beginning. 2  Writes are VERY expensive on the typical RAID 5 array. 3  Even on other RAID layouts your using up power & CPU. 4  Almost impossible to prove that defragging DOES actually improve performance.
http://serverfault.com/questions/403/should-i-defrag-my-raid-volumes
If your files are fragmented and you defrag a raid 0 it doesn't mean it puts all the data on one drive...if it did that it wouldn't be raid 0..It basically moves all the files around so they aren't fragmented. Think of it this way.You download a few movies or whatever with a bitorrent application.aid 0 is basically striping the data to two drives. When you read files off a raid 0 it pulls the data blocks from each drive and puts it together. That's the purpose of raid 0.
http://www.tomshardware.com/forum/243624-32-raid-defrag
Defragmentation describes the process of physically organizing the contents of a hard drive or partition so that the data sectors of each file will be stored close together to reduce load and seek times. Dont see Raid as different har drivers. It is different but combined together as one.ny benefit you receive will be extremelty short-lived as a few writes later you will be extremely fragmented again. See, the problem is Windows sees RAID 0 as a single drive and defrags it that way. The RAID controller does not. If the RAID controller wrote data only to one drive then defragging would help.
http://answers.microsoft.com/en-us/windows/forum/windows_7-performance/benefits-to-defragment-a-raid-0-sas-2-disk-in/98fee97e-c656-4ba4-a44d-cfce24a3e031
is it okay to defrag a raid 5
No, it is not ok to defrag a Redundant Array of Inexpensive Disks 5. No, it is not okay to defrag a Redundant Array of Independent Disks 5.