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Questions tagged [defrag]

41 questions
30
votes
3 answers

Should I defrag my RAID volumes?

It seems to me that since RAID volumes are logical (as opposed to physical), the layout that the OS believes they have might not correspond to the actual phsyical layout. So does defrag make sense for RAID?
Aidan Ryan
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25
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7 answers

Do I need to defrag unix filesystems?

I know Windows file systems are very sensitive to fragmentation and Unix such as UFS, ZFS, ext3, or ext4 are not as sensitive. But, is there any reason to defragment these filesystems at all? If so, what tools are available for that ?
paulgreg
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25
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9 answers

How much space should you leave free on a hard disk?

Is there a rule of thumb for how much space to leave free on a hard disk? I used to hear you should leave at least 5% free to avoid fragmentation. [I know the answer depends on usage (eg: video files vs text), size of disk, RAID level, disk format,…
username
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9
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1 answer

How can I tell when it is time to defrag my SQLServer database?

What is the best practice for measuring SQLServer database fragmentation/performance rolloff and determining when to defrag a SQLServer database table? I'm most interested in learning what the useful metrics are and what level of performance…
Jeff Leonard
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8
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9 answers

Defragmenters useful for *nix?

Having come from a windows enviroment, I was curious if defragmenters are useful in *nix. More specifically, OS X.
GeoffreyF67
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7
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3 answers

Is Windows Disk Defragmenter good enough?

I know this can be sound a little like an open question, but I want your thoughts here. Maybe if someone have make a benchmark test or based on your experience. Do you think that Windows Defragmenter is good enough? Are tools like Diskeeper or Raxco…
Ricardo Polo Jaramillo
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6
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4 answers

Does Windows Defrag utility reports fragmentation correctly on a RAID system?

We have a server with a RAID volume. Windows DEFRAG shows very high fragmentation (90%) on the volume. My chief asked if DEFRAG reported fragmentation is correct (or near correct) or not. We don't have any defrag being made for a long time (at…
Fabricio Araujo
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1 answer

How to defrag volume using mountpoint?

I am trying to defrag the volume by optimize-volume cmdlet . I have passed mount point path. But it fails as below. PS C:\Users\Administrator> Optimize-Volume -Path C:\Testvol1\disk Optimize-Volume : No MSFT_Volume objects found with property 'Path'…
Samselvaprabu
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5
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6 answers

Does defragmenting your hard drive before resizing the partition have any benefits?

Whenever I install Linux on a box that has Windows, and I want to dual boot, I always defragment the hard drive as much as possible before resizing the partition. Is this just superstition, or is it actually a good idea?
andrewrk
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4 answers

VM Virtual guest machine disk defrag improves performance, myth or reality?

In operation of a virtual Vmware or Hyper-V guest typically advice is given to defrag the host and virtual disk images so to result in improved performance. Something like a cmd: vmware-vdiskmanager -d works great. Yet I can't find any…
jafin
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4
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3 answers

How do I move the physical location of $MFTMirr, to allow resizing the partition?

When an NTFS volume is created, the first four entries of the MFT are copied and placed halfway the volume in the $MFTMirr file. According to Microsoft, since XP these files (metadata files) can be moved, but in practice I don't seem to be able to…
Abel
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4
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4 answers

Resizing volume with DiskPart unsuccessful, while there's enough free space

I have a physical disk with two partitions, an old OS partition (with MBR) of 296GB and a RECOVERY partition of 2048MB (a default DELL recovery partition), both are not in use. I have successfully resized the OS partition from 296GB to 174GB with…
Abel
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3
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5 answers

Windows 2008 Microsoft Disk Defragmenter

Is the Disk Defrag utility built into Windows 2008 and Windows 2008 R2 good enough? I see lots of 3rd party defragmentation tools out there but I'm wondering if they were meant for Windows 2003 and below? I don't have any special fragmentation…
user27387
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1 answer

Should you defrag before capturing an image?

If I'm capturing an image with imagex.exe /capture ..., does it matter if I defrag the hard disk prior to doing so (or strictly speaking, before sysprep)? Is there any benefit to doing so with a file-based imager like this? Would there be any…
Tim Lehner
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3
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4 answers

Is defragmentation of VHDs necessary?

I've got about 60 servers that were migrated from physical machines running on ESX 4. I'm having issues with the Diskeeper software installed, and I'm trying to decide if I should try to fix the software or just disable/uninstall it. Any need to…
CarloBaldini
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