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So im setting up raid 5 with 5 drives All drives are 512 bytes per sector drives Should I set my stripe size to = my sector size, or a multiple/factor of my sector size I'll be storing games and a lot of mp4's Some of the older games will be loaded directly from the array, the newer ones will only be "hot" backupsBy definition, stripe size is the segment size times (number of disks minus parity disks) So for RAID1, this is just stripe size = segment size because N disks with N1 parity disks = 1 The stripe size is the size of the blocks written/read to/from each drive In the 2 disk RAID0 array example above, the stripe size is 64K That means that maximum performance will be attained
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Ssd raid 1 stripe size
Ssd raid 1 stripe size- I recently installed two Intel X25M ssd drives in raid0 for my OS and application drive I originally had a single drive, and it performed well I wanted the logical C drive to be larger, so I got a second X25M in raid0 Using the onboard raid from a Asus P6T deluxe, I arbitrarily picked a stripe size of 64K primary filesystem block size for vmfs5 it is 1MB (with subblock 8kB) secondary filesystem block size (that of VMs) depends on filesystem used (ie btrfs has default blocksize 16kB, ntfs 4kB, etc) ssd eraseblock size this differs with vendors, mostly 4MB, but I have seen values between 1MB and 8MB
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RAID chunk size is an important concept to be familiar with if you're setting up a RAID level that stripes data across drives, such as RAID 0, RAID 01, RAID 3, RAID 4, RAID 5 and RAID Realworld copy testset from RAID 10 HDD to Ramdisk 29 minutes Realworld copy testset from SSD RAID 6 to Ramdisk 0441 minutes average approx 55mb/s So the new setup is already a LOT faster then the old, thats for sure but quite a lot slower than the benchmarks with 4k to 512kb read would imply QD1 RAID 0 Stripe Sizes Compared with SSDs OCZ Vertex Drives Tested We all know that two is better than one, we have dual core CPUs, dual GPU video cards, and if you really want to get the most out of your storage, a set of SSDs in RAID will boost your performance noticeably We tested 6 different RAID stripe sizes and 3 different RAID configs in
The reason not to use RAID 1 isn't that SSDs don't fail The reason not to use RAID 1 is that SSDs consistently fail the same way, at the same number of duty cycles A functional RAID 1 guarantees that you're putting the exact same number of duty cycles on both drives!In lays the confusion The stripe size is 16K * Number of spindles So when setting the stripe size in your raid array its the stripe segment size * the number of spindles In this example of setting 16KB stripe size the stripe segment size is 16KB/# of data If it is strip size that the controller uses, in your case (1KB 330KB average file size) I would go with 64K which will give you a 128K 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
In modern operating systems, the default raid stripe size is somewhere between 128KB and 256KB by default This is also the case for hardware raid cards default stripe size As well, the file system readahead value defaults to somewhere between 128KB and 256KB in many modern operating systems What are people who are using ssd raid 0 set ups using for stripe size? #1 I've got a 2 drive 640GB Black Caviar RAID that I want to set up as just an OS and apps boot drive I realize larger block sizes have more through put but waste disk space, and smaller sizes save space but are less efficient My user folder (mail, media, itunes, video, docs) will be on a separate drive
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From the SSD perspective, it is good to note that the Intel® SSD DC S3510 has a default Sector size of 512 Bytes, and Physical Sector Size of 4KB (4096 bytes) So, a Stripe size in multiples of 4,096 Bytes should work well Also keep in mind that proper File System Alignment will also help performance and endurance Most RAID controllers allow the user to define her or his favorite stripe size, because it alters the performance characteristics of a RAID array Typical options are 16, 32, 64 and 128 kB, butRAID 1 (Mirroring) RAID 1 maintains duplicate sets of all data on two separate drives while showing just one set of data as a logical disk (Figure 3) RAID 1 is about protection, not performance or capacity Since each drive holds copies of the same data, the usable capacity is 50% of the available drives in the RAID set
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Use multiple disks and stripe them together to get a combined higher IOPS and Throughput limit The combined limit per VM should be higher than the combined limits of attached premium disks Stripe Size Smaller stripe size for random small IO pattern seen in OLTP applications For example, use stripe size of 64 KB for SQL Server OLTP application 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) 64kb is not the best stripe size for a filesystem with a lot of small files ) I remember that even my old mainboard Asus P5Q was supporting a stripe size of 4128kb RAID 0 vs SSD By Hankisanerd in forum Other Series Motherboards Replies 1 Last Post , 0445 PM
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HD Tune for SSD shows 9570 MB/s HD Tune for HDD shows 10 MB/s 9 folders with GB test files MB/s Seagate HDD RAID 1 speed Hash & CRC SSD RAID 1 reading speed 103 GB/s FAR Manager SSD RAID 1 reading speed MB/s Little slower, because of NUL device FAR Manager HDD RAID 1 reading speed 661 MB/s The stripe size does not make a big difference on a RAID 1 The stripe size is most important when you are spreading the data across multiple disks The size of the stripe can have an impact on the performance of the array by spreading data across the drives or limiting the data access to a single drive By changing the stripe size you can make your arrays seek time or In the sequential read test, the best performance was achieved with stripe sizes from 32 kiB to 128 kiB The RAID array was between 61% and 107% faster than a single SSD In the sequential write
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Stripe unit size can significantly improve the performance metrics of an SSDbased disk subsystem In particular, the experimental results for the studied benchmarks reveal that a 4KB stripe unit size can improve the throughput and response time of an SSDbased RAID4 array up to 676% and 522% respectively, as compared to 128KB stripe unit size In So, for use cases such as databases and email servers, you should go for a bigger RAID chunk size, say, 64 KB or larger If you access tons of small files, a smaller stripe size like 16K or 32K is recommended For primarily large, sequential accesses like video files, a higher stripe size like 128K is recommended From practical experience, there appears to be a definite advantage in using RAID 0 for SSDs The very fast ssd seek time changed the situation So far I've just used the default 128KB stripe size Sample sizes vary greatly, even within libs, so it's a matter of finding the happy medium
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Test Setup Page 1 RAID Scaling Charts, Part 3 Stripe Sizes At RAID 0, 5, 6 Analyzed Page 2 RAID A Quick Summary Page 3 Tom's Hardware Articles Related To RAID Page 4 Stripe Size 4MB stripes Simply put your drives should be big enough that that large stripe size won't hurt you for all the small files you might have If your controller supports larger, go RAID 0 SSD faces actually more risks in data loss than a single SSD drive because once an SSD in RAID 0 is damaged, the entire RAID becomes unusable However, except for SSD RAID 0, other RAID levels such as SSD RAID 1 can provide data redundancy
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Stripe size is the size of each chunk written to each physical drive So if you have your logical RAID disk with 128k stripes, you will bop between the two disks that many times If you have a file system with 64k blocks, you will write two block before bopping to the other disk You don't "save space" from using smaller stripes ReBest Strip size for 2x1GB SSD RAID Drives on the intel ports I reflashed BIOS to 110 set up RAID 0 with 2 Samsung 0 256GB and ran AS SSD Benchmark on both my computers I checked that Trim was enabled on the Z77 FTWI was looking at this toms 6 ssd raid 0 review and I didn't see it anywhere in there Also, I've been waiting to see someone fill all 6 sata ports on a z87 and see what it would max out at
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This concept of moving to the next data bearing disk in the range is not the stripe size This is the stripe segment size;The Ssds are Samsung 860 QVO 4TB Raid controller is Z390 chipset Spoiler is extra info, not really required to answer my question Spoiler The raid array will be used to store my steam library, and if there is a game I want to Best Stripe size for SSD Raid 0 Jump to Latest Follow 1 5 of 5 Posts gooddog Registered Joined 941 Posts Discussion Starter #1 Hi, I am raiding two Crucial C300's 256g
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SSD RAID 10 A better alternative to RAID 5 or RAID 6 may be to use an SSD RAID configuration at level 10 RAID 10 uses RAID stripe (a common SSD RAID 10 stripe size is 128 or 256 kb) and mirroring to provide fault tolerance with a minimum of four SSDs The three pillars of RAID performance Cache Striping Chunk size Let's look at all three Cache Cache is simply RAM, or memory, placed in the data path in front of a disk or disk array You can Yes it was done with a fast initialization, stripe size was 256k which is pretty standard on both the Raid5 and Raid50 (Raid 50) Technically as a backup server, it's not a huge deal if i lose the array I follow the 321 rule, so all I'd be losing would be at most, 6 days worth of backups (weekly fulls to tape) and even then, 80% of my data also has SAN snapshots I
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TweakTown will show you how it's done with Intel Optane Memory in RAID 0 Select stripe size and click on Create Volume AS SSD Version and / or Patch Used 1 Chunk size influence on RAID 0, 4, 5 RAID stripe size applies only to certain arrays RAID 0 stripe size RAID 4 stripe size RAID 5 stripe size The explanation is simple stripes are not used for mirroring (RAID 1) or simple concatenation (RAIDlinear) The size of the strip itself affects significant processes Delay of writing and reading most people do recommend 128k stripe size for Intel based controllers when using 2x SSDs, 256k for 4xSSD and scaling upwards if you have a dedicated RAID controller card you'll have to experiment yourself as they behave differently regarding RAID 0 and stripe size
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RAID 10 is a nested RAID level with a RAID 0 on top of two or more RAID 1 volumes Figure 4 RAID 10 data layout Read I/O is distributed across all member drives The formula for RAID IOPS, both random and sequential is RAID read IOPS = N X Disk read IOPS The reason for this is that read I/O can be distributed across all four member disks We have a PowerEdge 2900 III with a PERC 6/i card and a single RAID10 array (4x 2TB SAS HDDs 72K) with the following settings Adaptive Read Ahead Write Back 64K Stripe Size Disk Cache Disabled The server hosts XenServer and a handful of VMs that run a mixture of operating systems such as SBS 08 I got a server that has Dell Perc H730P mini Raid controller I want to create a RAID 10 array of 4x Samsung SSD disks Samsung MZ7LM960HCHP The server will run Windows server 19, hosting few websites with few intensive SQL databases What is the stripe size should I use for the RAID 10 array?
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The RAID stripe size is simply how big each contiguous stripe is on each disk in a RAID 0/5/6 setup (RAID 1 is mirrored, so stripe size is inconsequential), and it should be tuned for the situation Let's look at two examples with MSSQL server, one with spinning disks and one with SSD disks Example 1 Five spinning disks in a RAID 5 setupRAID 5 for 3x and more SSDs, or RAID 10 for 4x and more pair SSD Disk cache policy Default (enabled by default) Write policy Write Through or Write Back, depends on the configuration Read policy No read ahead Stripe Size 64KCongrats, you've borked performance for zero benefit
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All tests are using Writeback Cache and 64k stripe size in the configuration A later test will be to play with the stripe size and see what yields the best performance into the virtual environment, but that will come later The results, averaged, for each test are below RAID 5 with all disks – 64k stripeConventional wisdom about RAID doesn't apply well to SSDs They don't really need striping (RAID0) They are prone to failures bydesign, but RAID1 is usually not the right answer for SSD for two reasons a) is wasteful, halves the capacity of the SSD array (and they are pricey) and 2) SSDs failure characteristics leads towards both drives in the mirror to fail at very close intervals Stripe Size 64K Recommended settings for hardware RAID arrays based on SSD RAID type RAID 1 for 2x SSDs;
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Stripe size determines how files are broken up between hard drives Say you have a 1MB stripe size, when writing a 512KB file, it will only write to one HDD and have the same performance as one What stripe size should I use for 2 ssds used for a gaming library?
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