Raid stripe size file

Any file found can be viewed before exporting the data for free. The Recovery Wizard will tell you how to do any action during the recovery process, so you can do it if you do not have enough skills. And the recovered data folders and files can be exported to local or remote places including FTP.

Run the Wizard, if necessary, and determine the array to scan the available arrays will be determined automatically; you just need to click on the desired one. Next, you will see the files found on the screen and get read-only access to them.

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. 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.

In your case, going from a virtual disk presented from a RAID controller to a SATA motherboard controller, you will want to make sure that the proper driver more info here for your motherboard is present and enabled in Windows before you run the backup.

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. Best Answer. Northlandeng This person is a verified professional. Verify your account to enable IT peers to see that you are a professional. View this "Best Answer" in the replies below ». Popular Topics in Data Storage.

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Stick with NTFS. 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.

Topics Business Computing. See all comments 5. I've found conflicting opinions re stripe size, so I did my own tests though I don't have precision measuring tools like you guys. Although these values seem even better than before, you can see the rate of improvement is slowing dramatically. For the defaults, a KB readahead and KB stripe gave you For a KB readahead and 1MB stripe, you got to Increasing the readahead a further 4 fold increased theoretical performance to There is also a problem that, we are assuming that reading the data from the drive takes zero time.

This is far short of the This is also far short of the This is true even if you optimize the raid stripe and readahead perfectly. Beyond this point, additional performance becomes far more difficult to achieve, requiring dramatically increased KB read per seek, which has its own negative performance consequences.

It may seem like you can just keep increasing the readahead and always get better performance, but this is not the case. This data sits in ram as part of the linux file system cache, which is used to store copies of recently read files. To store this new data in the cache, something else has to be removed first.

Likewise, if your server needs this ram for some other reason, such as, a different file has just been read from disk, old data will be flushed out of ram. Now that the drive is performing a large percentage of the sequential data transfer it is capable of, there are diminishing returns, and increasing costs, to simply growing the readahead forever.

One way to address this is to manage the amount of ram used for readaheads to a reasonable level, so that the odds are very good that the data will still be in ram when you actually need it. For a server with 1, simultaneous users downloading files or watching videos, a 1MB readahead means that 1GB of recently read data needs to be kept in ram at all times.

This is necessary to prevent this data from being discarded before it is used. For a server with 8gb ram, 1gb ram use is pretty reasonable. There is a good chance this data will not be flushed before you need it. Meanwhile, you also are having performance issues, and you think a huge readahead may help with this, so you set it to 10MB.

However, with a 10MB readahead setting on a server with 10, simultaneous users, readaheads will require GB of ram! Unless this server GB ram or more, it is certain that most of the data you read from disk will be discarded before a user ever downloads it, making your performance problems dramatically worse. As well this is ram that could otherwise be used for larger TCP buffers, which would speed up users downloads. For servers with a huge number of connections, these various caches and buffers are a delicate balancing act.

We hope this article has helped you learn about an often-misunderstood and important setting for tuning disk performance. With SSDs becoming ever more popular, there are fewer cases where there is a need to tweak these settings.