Yeh I know what it will handel but is that the optimal for best performance? And why would it be?
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What size of cluster for Raid 0
System spec's
Motherboard= Asus A7N8X-E deluxe
CPU= 2500+ Barton OC@ 200 FSBX11 2.2GHZ 3200+
Ram= 2X256 PC3200
Hard drive= 2X SATA150 WD 36gb rapture 10k
Video= Asus Radeon 9800XT
What is the optimal size of the clusters ie 4k 8k 16k ect...
For best performance in the raid set up and why?
Running OS's
Partition 0= Win98se 7gb fat32
Partition 1= Win ME 7gb fat32
Partition 2= Win XP pro 10gb ntfs
Partition 3= Programs 10gb fat32
Partition 4= Data 6gb fat32
Partition 5= Images 30gb fat32
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Answers
Well a lot depends on fragmentation of files the average size of files the size of the partition ect.
Followind is a quote from Partion magic. I does not directly adress what you ask but the info may be worht something.
Use Resize Clusters to change the cluster size on FAT, FAT32, and NTFS partitions. Reducing cluster size may help you reclaim wasted space on your hard disk.
All files on FAT and FAT32 partitions are stored in allocation units called clusters. Each file is allocated at least one cluster, resulting in wasted space in clusters containing small files. The size of a partition determines cluster size. Larger partitions have larger clusters, and, therefore, more wasted space. For more information about managing your hard disk space, click See Also on the Help toolbar.
It is not recommended that you use the smallest cluster size on partitions containing a single, large file, such as a database or swap file.
Default Cluster Sizes
A partition's cluster size is set by the DOS FORMAT operation, based on the size of the partition, as shown in the following tables.
DOS and Windows default FAT cluster sizes
Partition Size (MB) FAT Type Sectors Per Cluster Cluster Size
0-15 12-bit 8 512 bytes
16-127 16-bit 4 2 K
128-255 16-bit 8 4 K
256-511 16-bit 16 8 K
512-1,023 16-bit 32 16 K
1,024-2,047 16-bit 64 32 K
2,048-4,096 16-bit 128 64 K*
*Only available with Windows NT and Windows 2000/XP.
Windows FAT32 cluster sizes
Partition Size (GB) Sectors Per Cluster Cluster Size
0.256-8.01 8 4 K
8.02-16.02 16 8 K
16.03-32.04 32 16 K
> 32.04 64 32 K
Resize Clusters Information
The Resize Clusters dialog box displays the possible cluster sizes from 512 bytes to 64 KB. For each cluster size, PartitionMagic displays the following:
· A bar graph and percentages represent how much space would be used and how much space would be wasted if you chose that cluster size for the currently selected partition
· Wasted space (in megabytes)
· The range of allowable partition sizes (in megabytes) or other information
· If a cluster size requires a partition that is too small for the data and files on the partition, "Not Allowed" appears in the Notes column. "Not Enabled" appears in the Notes column for the 64 KB cluster size because it is only used for Windows NT. You can enable the 64 KB cluster size, but it is not recommended.
The lower area of the Resize Clusters dialog box displays information about the current and new cluster size, as well as the current and new partition size (based on the new cluster size). You can click the New cluster size drop-down list to change the cluster size.
PartitionMagic adheres to the established limits for partition and cluster sizes. You cannot select a cluster size that is invalid for the selected partition.
Choosing a smaller cluster size may resize the partition smaller, creating free space next to the partition. You can use this free space to create a new partition.
Copyright © 1994-2002 PowerQuest Corporation. All rights reserved.
Also from PM
NTFS (New Technology File System)
The New Technology File System (NTFS) is accessible by Windows NT/2000/XP. NTFS is not recommended for use on disks less than 400 MB because it uses a great deal of space for system structures.
The central system structure of the NTFS file system is the master file table (MFT). NTFS keeps multiple copies of the critical portion of the MFT to protect against corruption and data loss.
Like FAT and FAT32, NTFS uses clusters to store data files; however, the size of the clusters is not dependent on the size of the disk or partition. A cluster size as small as 512 bytes can be specified, regardless of whether a partition is 500 MB or 5 GB. Using small clusters not only reduces the amount of wasted disk space, but also reduces file fragmentation, a condition where files are broken up over many noncontiguous clusters, resulting in slower file access. Because of its ability to use small clusters, NTFS provides good performance on large drives.
Finally, the NTFS file system supports hot fixing, a process through which bad sectors are automatically detected and marked so that they will not be used.
All PartitionMagic features can be used with NTFS, except those features that are specific to the FAT and FAT32 file systems.
Copyright © 1994-2002 PowerQuest Corporation. All rights reserved.
big files picked up in one swoop (interleaving aside) wanna be bigger clusters, ie video files are generrally big.
It all depends on what data your shoving about, which makes sense really the disk don't care what OS you're using, it's only concern is its own Filesystem and the data contained therein
- Video - I'd go for FAT32 for speed, big clusters and defragged often.
Hang on IIRC isn't RAID 0 striping, It's not worth the fractional speed increase mate. Don't stripe unless your data is of no great concern to you.
Yours - an exspeed junkie with all the damaged hardware to show for a few milliseconds
To CrazyOne Thank you for your time. I do have PM 7.0 and have read that info.
And I do understand about the size of clusters to data storage and wasted space that it entails.
To HippyWarlock Thank you for your time also. I can appreciate your concern for not using a striped array.
I have been running a striped array on my old pc for 3yrs now with IBM delta drives (I live dangerously)
This is a none mission critical pc.
Its more like a tinker with it toy if you will.
A local pc company where I live claims to have the fastest PC's on the planet and is offering $1000 to anyone that can buy or build a faster like model PC.
So I need to tweak it anywhere I can.
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by: mattisflonesPosted on 2004-02-22 at 06:57:41ID: 10425602
The 40GB bigbro drive on SATA could handle max 64K.
Mattis