Although the unRAID system is not designed for high-performance requirements, like database servers and high demand media servers, there is no reason we cannot try to achieve the maximum possible performance with the money and hardware we have invested into it. Here are a number of collected ideas to help improve your performance. Of course, these assume that you have your unRAID system running correctly. If you have a bad drive or cable, or incompatible hardware, or mis-configured CMOS settings, no amount of tips are going to help.
Checking the User Benchmarks tables may be helpful, for comparing your system with others. Add a Cache drive with the Plus or Pro license only to your User Shares for a major improvement in write speed.How to replace or upgrade a disk in your array on unRAID
The Cache drive improves performance by postponing the parity processing, so writes to it are at full speed. The files are later moved to the parity-protected data drives during off-hours. A side effect of this is that file fragmentation is also reduced, if there is simultaneous streaming from the User Shares.
Although the simultaneous writes produce fragmented files, the transfers later to their permanent locations on the parity protected drives are done one file at a time, which should normally create files without fragmentation. The cache drive is described in the release notes here. For best write speed, move it to the fastest unshared connection.
There is some evidence that you can improve parity check performance, reducing the impact of having several drives on the PCI bus, by alternating the disk slots across the various controllers. Assigning drives in a round robin style parity on controller1, disk1 on controller2, disk2 on controller3, disk4 on controller1, etc.
Your largest drives will most likely store the majority of your data, and therefore will be read more often when you retrieve that data. If you must have drives on the PCI bus, realize that they will be slower, and organize your data accordingly. Consider this as you are building your unRAID server and position your drives and cables to optimize performance. If you have already built your unRAID server and populated it with data, you can still rearrange your drives and cables to optimize performance without ever losing parity protection.
Here's how:. For a complementary guide to the same process, see the FAQ: What is the safe way to rearrange disk numbers, assignments, slots, etc? A tweezer or needle-nose is usually necessary to remove it.In order to help combat physical drive failure, unRAID allows for the inclusion of a parity drive, which is used to contain parity bit information for all of the other data drives.
This information can be used to rebuild the data on any drive if it has to be replaced either for an upgrade or because it died.
Fitting the components together is usually straightforward, and requires little prior knowledge or experience. A typical assembly would involve the following steps:. You will first see a command line prompt on the monitor. You should get an output similar to this:. If you are using a Mac, you may initially need to use your server's IP address instead of 'tower'.
By default, unRAID creates a share for each disk in the array eg. You can create folders in each of the disk shares, and then a user folder will "aggregate" all of the content from each share into one share with that folder name. To turn on user shares, go to the Shares menu item. Select an option from the User Shares dropdown. If you want the shares to be read-only, select "Export read-only.
You can set passwords for "root" and any other user you define. You can limit specific shares to specific users, and restrict specific users from write permission while granting write permission to others.
This is all configured per share on the Share page. All security settings can be changed on the Security page. To delete a user, delete the user's name and password and press Save. Once you Telnet in or use the console on the serveryou can run important Linux commands such as:.
Jump to: navigationsearch. Important Warning! This wiki page has not been updated for v6! Some information is out-of-date! Categories : Getting started How To. Personal tools Log in.I have a Samsung Pro GB as cache drive, but it's way to small. Other things to think of?
I already thought that EVO's are not suitable for server purposes so good that you can confirm. Thanks for the confirmations! I have had zero problems with them and they haven't been used lightly.
One VM is a security camera server. On top of that the cache drive is still used for storage array writes mover runs nightly. They also survived a F temps when a fan failed. You might reconsider how you use cache. There is no requirement to cache user share writes. So those user shares aren't cached, don't use up space on cache, don't have to be moved later, and are immediately protected by parity. Yeah, true. Only it's still not enough.
For the Movies share, it would make sense to do that as those tend to be larger and less frequent additions. Yeah, good one!
Maybe it's better to just cache the tv shows and not the movies or other stuff. Then I'll can use it a little longer. At the moment I'll rather prefer to spend my money on a new rack open or closed then a couple of SSD's.
As well as they have performed for me, I'm fine with that. If your happy with your SDD's then it's okay! The Sandisks uses TLC memory cells. If I'm correct MLC memory cells can do more writes. It's only the past year or so that cache has been used for Docker and the likes. Newer hard disks have much higher transfer rates, e. Transferring large files directly to the array is limited by my gigabit connection? If you are willing to spin up all your disks it's getting closer. Different people use their servers differently, but I think often people just assume they want the faster writing cache gives without really considering the benefits of not caching.
A nice thing of the cache disk is that not all drives spin up. I have a couple of drives with tv-shows and if there is a new episode it's nice that it's written to the cache drive.
Only I'm not sure how often Sonarr access the tv-shows and thus spin up the drives. And a media player can scan and index photos or music files based on data cached to SSD - it's not until play time that the FUSE app needs to make requests to the original backing store. The main reason for the above is that it's part of a distributed backup solution - the backup server does deduplication of unique files and keeps track of which file systems that contained references to the different files.By binarDecember 12, in Storage Devices and Controllers.
I do not trust hard drives that use Shingled magnetic recording SMR technology to store my data. Lastly, I need to buy 5 hard drives for the Unraid system I am building.
Prices for the two are close together. So I would appreciate any opinions relating to which of the two is the most reliable? Thanks in advance for the help. Was there something specific you had seen or experienced that made you technology shy to SMR drives? Note that all current 3. Good luck on this one. I am going to refer you to this blog from Backblaze as they are the only ones who have ever posted up any data on drive failure rates. As you can see from this, the failure rates of all drives are very low.
There are variations between models from the same manufacturer. While I have not analyzed the data that closely for this quarter, it often seems that this model variation may be larger than between manufacturers. Now you also have to realize that Backblaze usage pattern is not exactly like the one of the typical Unraid user but it is the only data that is available in the 'wild' for large numbers of drives.
I believe that their purchase decision is primarily made on pricing. They are looking for the lowest cost per TB!
That could be why there are fewer WDC drives in the recent reports. You would have to read the older quarterly reports to find if this supposition is true.
That is also why you don't find any 'Enterprise' class drives in their data. I believe they think as I do that all hard drives have basically the same quality and only difference is the marketing strategy-- pricing vs warranty costs. I will make a couple of more observations.
First, every hard drive manufacturer will have manufacturing lots of drives that have lower quality levels.
Unleash Your Hardware
Therefore, you can protected yourself from buying into one of these lots by not buying a larger quantity of drives at the same time from the same source. Concealed shipping damage is another issue. We all know that packing practices varying between vendors and even between individual packers at the same vendor and the physical abuse that the package receives varies with each carton, so buying from different sources at different times may be wise. There are grains of truth in what you wrote.
Just think of the forces inside a hard drive, how hard they spin, and how much engineering it takes to write and read the data on the platters. I came from a background in precision optics, which requires incredibly precise tolerances, and was shocked to learn that hard drives are designed in an equally precise tolerance range, yet are made in the millions and sold as a commodity.
I had on one of their enterprise differential SCSI drive lines. That was a dark time persoanally. I have learned there are currently three type of recording technologies which I have listed below:. I called Western Digital again and this time the tech told me he could not disclose which of the three recording technologies their 12TB an 14TB Gold Label server grade hard drives use.
So I'm back to square one. Can anyone out there please point me to a website that will clarify for me what recording technologies do 12tb and 14tb hard drives use categorized by Hard Drive Manufacturer. What I have noticed is hard drive manufacturers do not really want to disclose this information and I believe as a consumer I have the right to know such details. Any help will be greatly appreciated. Thank you for your post.
From what I have read SMR hard drives have a write speed penalty associated with them.By AbulaJune 25, in Hardware. I'm starting to plan a new unRaid server, so i wanted some advice into what would be the best parity drives, im planning to start small fewer drives and grow the server as the storage need increases, it will be used mostly to store large MKV files, so i was thinking on using 2x 10tb drives for parity, was checking the following.Fedlog training
Im also considering waiting for the 12tb, to have a more flexibility down the road into what i can add to the server.
It's totally a personal choice of course but I don't see the need for dual parity until you get to a large number of drives. For example, I have a large unRAID server where I have maxed out the number of drives allowed on a Pro license, which is 30, 28 data and two parity. For an array that large, I feel its worth while to have dual parity.
On a smaller array I don't think it's a good value proposition, you want to max out your storage, so consider using that second parity drive as a data drive instead.
As for what drive is the 'best' for parity, that's up to you and what you can afford. I would suggest that you not try to get parity drive larger than your data drives. Sort of a waste. If there were an incredibly deal on 10T I might feel different, but right now 10T are at a premium. Instead, consider getting an extra drive to take backups. If you've already got backup plans, feel free to ignore this advice.
They are the best value going. The general rule of thumb is to get parity drives as large as, and as fast as, your largest and fastest data drive. Writes to the array will always be limited to the speed of the slower disk data or parity. That said, having faster parity drives can help if you need to support multiple writes simultaneously. Here is the spec sheet for the 10TB IronWolf. Under acoustic specs, it lists at 2. Here is the product manual if you'd like any further information on these drives.
Regardless of which drive you choose, thank you for considering Seagate! Thanks for the replies, i see all of you recommend going with the same size as the data, i personally thought into going in 10tb just for the parity to have the ability to add 10tb down the road. I have an Areca ARC controller.Please use this page with caution! It was updated much more in the days of v4 and v5, has seen little updating since the advent of v6.
That means many hardware recommendations may be obsolete. The following list is compiled by the unRAID user community. While it is mostly accurate, it is not definitively so, as it cannot be guaranteed that users have the time, expertise or diligence to test and report back all aspects. It is recommended that if you are using this list, you do so in conjunction with heavy use of the forum.
The syslog s will provide some evidence of good functionality, and running the parity checks will establish good habits going forward. Those looking to make purchase decisions will have more to go on than a casual statement of "it works perfect. The boards listed here have been added by users like you. They very likely have not tested all features of the board, so it is possible that a board listed here as compatible, will not prove compatible with your hardware.
As negative reports come in, they will be added to this list. The motherboard is probably the biggest and most important decision that you will make. There are 3 ways to go:. Here are some additional thoughts on the 4 classes of motherboards, from well-tested to untested.
It is recommended that you sort on 'Date Added', in order to locate current motherboards, those most recently added. Many boards listed below are now obsolete and discontinued. Those without dates should be considered very old. Sort by clicking twice on the little box with 2 triangles, at the bottom of the 'Date Added' column header.Fix ssd not detected
Note to editors: if possible add virtualization info eg. Perhaps in future we should add another column for it. Please use this section with great caution! It was updated only in the days of v4 and v5, has seen almost no updating since the advent of v6. That means most motherboards here may be obsolete, impossible to find, and are probably insufficient any way for a v6 system with Dockers and virtualization.
OK, so maybe your motherboard is not included on the list above, which is likely if your motherboard is relatively new. The following is an attempt at a guide to help you determine if your motherboard is compatible with unRAID or not, and what potential problems you should be aware of:.
The ultimate test of unRAID compatibility with any motherboard is to just try it.By spencerApril 14, in General Support.
Hi there I can't seem to get a straight answer on whether unraid support external hard drives in the array, please help. Thanks for the quick response once last quick question.
If I bought a multi bay enclosure with only 1 usb 3 port would they all be detected. Whether or not they would all be detected would be determined by the specific enclosure, but I don't know of any way to know beforehand, you will have to test.
Just wanted to keep you guys updated. I bought two external usb 3 enclosures and installed two spare drives a 4tb and 3tb. This is good try, rather low cost to add extra bay.Nike vapormax moc 2 gunsmoke
Recently I found those USB multibay enclosures price raise a lot. Ya I had no more room to add extra bays, as I already have bay hot swap cages in my antec case. I now have 22 array drives and 2 ssd cache drives, TB currently. What a big family. What enclosures did you end up with? Sent from my LG-D using Tapatalk.Spring pageable sort
Alright they finished clearing and are now mounted in the array. Couple things I noticed the temp and smart info isn't passing through. That won't really affect anything will it? Since unraid requires flawless reads from ALL devices other than the failed drive to reconstruct said failed drive, you are putting your entire array at risk by not being able to monitor the condition of those drives.
If the drives in the usb enclosures encounter a read or write error will unread still be able to red ball it. That's not an issue. So it's fairly likely that if you do have a problem, it will red ball all the USB drives. Then, without SMART data, it will be difficult to figure out which drive s may or may not actually have an issue.
It doesn't disable a disk for read errors. Often if unRAID can't successfully read a disk after several attempts, it will attempt to write the data back to the disk from the parity calculation, and if that write fails it would be disabled. But otherwise read errors won't disable a disk. But since you can't monitor the SMART of the disks, you can't get notifications of impending issues with those disks.
You do have Notifications setup don't you? And as mentioned, all drives must work well for parity to be able to reconstruct a disk. You can have a disk problem that doesn't cause it to be disabled, but could still be a problem when trying to reconstruct another disk.
Have you considered upsizing some of your disks?
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