Skip to main content. A striped volume RAID 0 combines areas of free space from multiple hard disks anywhere from 2 to 32 into 1 logical volume. Data that is written to a striped volume is interleaved to all disks at the same time instead of sequentially. Therefore, disk performance is the fastest on a RAID 0 volume as compared to any other type of disk configuration.
Requirements There must be at least two hard disk drives. All disks involved in the striped volume must be dynamic disks. Each portion of the free space must be exactly the same for example, the size and file system type.
Expand the Storage node. Click Disk Management. On the View menu, point to Topand then click Disk List. In the right pane, a column appears that lists the attributes of each disk in the system.
On the View menu, point to Bottomand then click Graphical View. A color-coded graphical view of the disks on the system is displayed. The Disk Description pane which is displayed in gray is positioned on the left side of the volume description, which is displayed in color. The disk description contains information about each disk's disk number, whether it is a basic or dynamic configuration, its size, and its status online or offline.
The volume descriptions are color-coded. They hold information about each volume, such as the drive letter if assignedwhether the volume is allocated or unallocated, the partition or volume size, and the health status of the volume. Type : Any disks involved in striping must be dynamic. Conversion from basic to dynamic goes very quickly without data loss. After you complete the conversion procedure, you must restart the computer. Capacity : The striped volume can take the whole disk or as little as 50 megabytes MB for each disk.
Unallocated space : Any disks that you want to upgrade to a dynamic disk must contain at least 1 MB of free space at the end of the disk for the upgrade to succeed. Disk Management automatically reserves this free space when it creates partitions or volumes on a disk, but disks with partitions or volumes that are created by other operating systems may not have this free space available. Status : The status of all disks involved in a striped volume must be online when you create the striped volume.
Device Type : You can install striping on any dynamic disk even if there are mixed drive architectures on the system. How to Upgrade to Dynamic Disks If the disks that are going to be involved in the striped volume are already dynamic disks, proceed to the "How to Convert to Striped Volume" section of this article. NOTE : You must be logged on as an administrator or a member of the Administrators group to complete this procedure.
Server Fault is a question and answer site for system and network administrators. It only takes a minute to sign up. The basic formula given is to divide the starting partition offset by the stripe size for the volume. Question: How can I find the stripe unit size? Dell Openmanage seems to tell me everything except the stripe size, and according to the aforementioned article, Windows does not have a reliable way to determine stripe unit sizes.
The default setup for PERC5i is 64bit stripes. I doubt you have changed anything there while installing. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. How can I determine my stripe size?
Ask Question. Asked 10 years, 8 months ago. Active 10 years, 8 months ago. Viewed 3k times. Sean Earp. Sean Earp Sean Earp 7, 3 3 gold badges 30 30 silver badges 37 37 bronze badges. Active Oldest Votes. I'm running OMSA v5. David David 3, 21 21 silver badges 20 20 bronze badges.Creating RAID levels by using different strip sizes and read or write policies on Dell PERC
Sign up or log in Sign up using Google. Sign up using Facebook.I am about to setup a new RAID 10 with 8 disks and I am confronted with the choice of the stripe size. From what I remember about stripe size is that in my RAID 10 config files will be distributed over 4 disk. What Adaptec is describing is "strip", or stripe element, size so I would go with 64K in your case. I agree with Patrick. Other than boot up time, you will probably not notice a difference in performance. And it being a server, you probably will not be rebooting it very often.
Windows Server on bare metal is a whole different story. The larger the size, the better the performance BUT the worse the utilization. So it is a trade off that you have to decide upon. Are you putting a hypervisor on this and then a virtual machine or installing Windows bare metal? I would go with NTFS, especially if you are talking about server. What is the server make and what RAID controller are you using.
There are two different "stripe" sizes involved here. There is the "stripe element" size often referred to as "strip" size which is the per drive size. Then there is the "stripe" size which is equal to the strip size x the number of drives in the stripe.
In your case, a 4 disk RAID 10, it would be strip size x 2 because of the mirroring. If it is strip size that the controller uses, in your case KB - KB average file size I would go with 64K which will give you a K stripe size. This is small enough as to not waste a lot of space, yet large enough where performance with large files should be satisfactory. As far as fragmentation, don't worry about it. First, you are using SSD's and fragmentation is not an issue with them because they have no moving parts.
And second, hardware RAID controllers are going to write data wherever they please and there is nothing you can do about it. In other words, once you enter the world of virtualization you should be basing these decisions on the recommendations of the hypervisor supplier.
Stripe size options vary, depending on your controller and RAID level. Normally, the default stripe size provides the best performance. You would be better off replacing that with 2 more disks for your raid and make your raid a 6 drive raid Put the OS on a partition in that rid set and you will get better performance and reliability for your data.
Using 10k or 15k drives fo the whole RAID is not an option as the relation of cost and power consumption doesn't match up here. So the only option would be a separate RAID 1 for the OS with database wotj 10k or 15k drives - I will consider this for the new server which is due end or Q1currently we are just running out of space od the RAID. Just using SSD for the OS boot disk however is a waste, and it's a common thing that people seem to want to do.
It is great that you guys helped me out here so quickly!
create volume stripe
If it makes you feel any better, one of my hard drives died in my home computer about an hour ago. Fortunately it's a mirror and I have backups. I just noticed that SSD for the OS is plugged in the Adaptec controller being a "simple volume" and not passthrough - does anyone know if I can just plug that SSD to the mainboard and boot it up?
I need that 8th port for the RAID 10 :- - otherwise I might have to try clonezilla, but if that fails I am in for a lot of fun It has been a long time since I worked with an Adaptec controller, but I know that on LSI controllers a single drive is usually treated as a single drive RAID 0 and presented to the OS as a virtual drive and thus will not boot as a standalone drive if connected to a SATA port on a motherboard.
I'm guessing that the "simple volume" vs.
Get Windows NTFS Block Size
If you clone it with clonezilla it will just make an identical bit for bit copy of it and you will have the same issue. Depending on how the Adaptec controller has configured your drive, you may just get by with changing this setting s and then moving the drive.
To continue this discussion, please ask a new question. Get answers from your peers along with millions of IT pros who visit Spiceworks.Windows systems write blocks of data to underlying storage — the size of these blocks is given various terms, for example —.
The important thing to consider is that this unit of allocation can have an impact on the performance of systems. By default Windows will format a disk with a standard 4KB block size. Microsoft Exchange server for example, recommends the unit size be 64KB. Microsoft recommend this for SQL server and virtual machines as well.
By not setting the value correctly on an underlying disk we can generate performance problems for our system. Aligning block size with the data set being written can help to ensure efficient IO processing.
Assuming this is a locally attached disk we can then have Windows write the extent as one contiguous block rather than having to split it up into say 4KB default sized blocks. If we are writing to SAN storage we also want to make sure the block size or whatever the vendor calls it is also appropriate, again to try and avoid split IO writes and to ensure performance.
Microsoft are deprecating the Get-wmiObjec t cmdlet in favour of the Get-cimInstance cmdlet. I have provided both as a reference in case you are doing this on older systems. We can make use of the fsutil amd DiskPart commands. As you can see Microsoft lack consistency in describing this attribute which is rather frustrating but such is the way of the IT world.
Personally I hate this notion and fully believe everything should be optimised and deployed according to best practices to get the most out of the system. This uses the property name AllocationUnitSize! This site uses Akismet to reduce spam. Learn how your comment data is processed. Windows systems write blocks of data to underlying storage — the size of these blocks is given various terms, for example — Block size Allocation unit Cluster size The important thing to consider is that this unit of allocation can have an impact on the performance of systems.
Clusters Per FileRecord Segment : 0. Volume 3 is the selected volume. Current File System. Allocation Unit Size : 64K. Flags : File Systems Supported for Formatting. Allocation Unit Sizes : 64K Default. Thanks Reply. Thanks, Dave Reply. Glad you found it useful Mark Reply.
Leave a Reply Cancel reply.This topic describes how to deploy Storage Spaces on a stand-alone server. For information about how to create a clustered storage space, see Deploy a Storage Spaces cluster on Windows Server R2. To create a storage space, you must first create one or more storage pools. A storage pool is a collection of physical disks. A storage pool enables storage aggregation, elastic capacity expansion, and delegated administration.
From a storage pool, you can create one or more virtual disks. These virtual disks are also referred to as storage spaces. A storage space appears to the Windows operating system as a regular disk from which you can create formatted volumes. When you create a virtual disk through the File and Storage Services user interface, you can configure the resiliency type simple, mirror, or paritythe provisioning type thin or fixedand the size. Through Windows PowerShell, you can set additional parameters such as the number of columns, the interleave value, and which physical disks in the pool to use.
For information about these additional parameters, see New-VirtualDisk and What are columns and how does Storage Spaces decide how many to use?
From a virtual disk, you can create one or more volumes. When you create a volume, you can configure the size, drive letter or folder, file system NTFS file system or Resilient File System ReFSallocation unit size, and an optional volume label.
This topic includes sample Windows PowerShell cmdlets that you can use to automate some of the procedures described. For more information, see PowerShell. A failover cluster deployment has different prerequisites, such as supported disk bus types, supported resiliency types, and the required minimum number of disks.
To plan for the number of physical disks and the desired resiliency type for a stand-alone server deployment, use the following guidelines. By default, available disks are included in a pool that is named the primordial pool. Make sure that the disks meet the requirements that are outlined in the Prerequisites section.
The New Storage Pool Wizard will open.Hello, I am setting up a new RAID 10 and needed to know what you think the best stripe size is for a partition on the array where my OS Windows 7 will be installed, along with my other programs.
I know what the stripe size is and what it means, so you don't need to explain that, I just can't seem to find the answer to my question anywhere Depends if you expect to mostly deal with small files or larger files. There's no single recommended stripe size that's generic. Default on most arrays ends up being KB stripes, but that's a compromise between small and large file performance. I know there isn't one standard value, I just wanted to get some recommendations. I'm installing Windows 7, and other standard more or less programs on the partition.
I don't know the average file size for Windows 7, but it can't be very large, so probably a smaller stripe would work better. Which would you use if you were in my place? I personally consider 64KB and KB to be pretty small stripes already so I would use either one of those, we use much larger stripes for some of our customer products admittedly those products tend to hold exclusively large files Based on that, I'd suggest a 64KB segment size.
Quote: I just wanted to get some recommendations Don't do it. The RAID 0 stripe won't benefit to random access enough to be worth taking the hit on the reliability. For many most? He might be intending to do one of the tasks that actually benefite from RAID That's a good point, thank you! Moderator et Subscriptor. Accs wrote:. Posted: Wed Apr 25, am. Posted: Wed Apr 25, pm.Before talking about stripe size, it is important to mention the term stripe width, which equals the number of drives in a RAID array: for example, five drives equal a stripe width of five.
Obviously, this value only changes if you alter the number of drives used in a RAID array; the more you add, the faster your RAID array will be, until you hit a controller or system interface bottleneck. Be careful here: stripe size does not represent the storage capacity of an entire stripe set spanning over all used drives. A stripe set consists of all individual stripes as a whole, each of them having the selected stripe size.
A stripe is the smallest chunk of data within a RAID array that can be addressed. People often also refer to this as granularity or block size. It can be compared to the blocks logical block addressing - LBA on conventional hard drives. Typical options are 16, 32, 64 and kB, but many professional RAID controllers also offer smaller stripe sizes, and some even support sizes as large as kB.
In fact, this feature is often overrated, as the performance changes are marginal on a typical gaming or office PC. However, it can be important for servers, though differences will still only be noticeable between very small and very large stripes with certain applications. If you want to create a RAID array for quick access to small files, small stripe sizes are favorable, to keep the waste of storage capacity small, and to provide high throughput thanks to a high level of data distribution across many drives.
File servers for photos, audio and video should, however, be operated with larger stripe sizes, as this helps to maximize sequential read performance. In the end, the best solution is to experiment with various options: try both a small and a large stripe size and collect performance data for it.
Current page: Stripe Size Discussion. Stripe Size Discussion Before talking about stripe size, it is important to mention the term stripe width, which equals the number of drives in a RAID array: for example, five drives equal a stripe width of five. In general, your stripe size choice has an impact on several factors: Performance Conventional hard drives deliver their best transfer performance when they read or write sequentially, repositioning the heads as little as possible.
From this standpoint, it makes the most sense to select the largest stripe size available, especially if your hard drives are good at providing high throughput. However, this only works if the files stored or read are at least as large as an entire stripe. If you will end of storing millions of text files, Word documents, small spreadsheets or similar small files, small stripe sizes will help to distribute all files across multiple drives to keep throughput high. Capacity Used The stripe size also defines the amount of storage capacity that will at least be occupied on a RAID partition when you write a file.