Western digital timelimited error recovery tler with raid. Ive read conflicting reports so i was really hoping someone else had a more definitive answer or perhaps even anecdotes. For people really worried about tler cctlerc, you can run smartctl on your qnap and enable a 7 seconds timer yourself. Nontler disks are still a pain in that theyll get prematurely dropped from the array on attempts to read a dodgy block, but readding the disk causes a resilver that essentially just replays the data written since the disk was last seen in the array, and not a fulldisk rebuild, which is much less stressful on the array, and also. Fehlerbehebungssteuerung error recovery control qwe. Is rapid storage technology raid compatible with tler. Just wanted to write up my experiences with my raid problems. To create a software raid 5, we need at least three hard drives of the same capacity, apart from the os drive. Tler is important but is a false positive and people mostly turn it off since they dont want to be rebuilding their raid arrays which could lead to loss of data if something goes wrong in the rebuild process i. How to create a software raid 1 in windows 7 as we mentioned earlier, on a level 1 raid two disks have the exact copy of. I tried raid 1, raid 0, and raid 5, and always had a problem with at least one of the drives dropping out of the array. I plan on running software raid 5 md on the 4 drives and at a later point putting in a 5th drive as a spare for the set. If youre using software raid like linux mdraid, it probably doesnt matter. Is hardware tlercctlerc in the hddnecessary on x39 models.
I remember mfenn saying that they used lots of green drives in software raid setups and they were fine, ymmv. If it isnt important for you then you can use desktop disks in raid. With softraids software raid system, you can be assured of always having the best and most current software controlling your raid system. Linux software raid and zfs do not use tler and therefore are a safer choice for your data then regular hardware raid controllers. Is error recovery control or tler necessary for software. For people really worried about tlercctlerc, you can run smartctl on your qnap and enable a 7 seconds timer yourself. This timeout period has also been implemented in some software raids as well. So you absolutely do want tler ercetc for a hardware raid setup. May 30, 2017 how to create a software raid 5 in windows 10 and 8. Nov 09, 2015 nontler disks are still a pain in that theyll get prematurely dropped from the array on attempts to read a dodgy block, but readding the disk causes a resilver that essentially just replays the data written since the disk was last seen in the array, and not a fulldisk rebuild, which is much less stressful on the array, and also. Jul 20, 2009 theres a bootable wd tler and wdidle3 boot disc on rapidshare. Without a hardware raid controller or a software raid implementation to drop the disk, normal no tler recovery ability is most stable. Raid will get two sectors from good and bad disks with different data.
Just finding the necessary software to create the booting device is a pain. Only you can assign bad disk as bad after this situation. However a desktop drive isnt suited to 247 operation and a 4tb drive will create a lot of vibration, heat etc which can all contribute to issues. Generally, the answer was firmer springs for vibrations in larger arrays and a longer warranty. Nov 17, 2010 linux software raid and zfs do not use tler and therefore are a safer choice for your data then regular hardware raid controllers. Raid, short for the redundant array of independent disks, is a technology to combine several hard drives into a single storage unit. Software raid 1 in windows 7 for increased data security.
For ultimate reliability in raid 10 on the ich9r controller, should i consider tler and or using the 1. Linux software raid and drive timeouts the ongoing struggle. Tler and friends because you want a shorter recovery time from the drives themselves. Is this true and i shouldnt use these drives or its just bla. That determines if tlercctlerc is really necessary or not. For ultimate reliability in raid 10 on the ich9r controller, should i consider tler andor using the 1.
Depends on the size and chassis and how vital the setup is. Is hardware tlercctlerc in the hddnecessary on x39. March 2016 technical product specification 334080001us 7 2 product overview intel rapid storage technology enterprise rste nvme is a set of products that provide raid support on supported enterprise environment with intel nvme ssds. Tler is definitely an issue with software raid as well, however some raid solutions software or otherwise are more tolerant than others. Tler is mostly important when you have a hardware raid controller. My thought is to take 2 drives, enable cctl tler on one, not on the other. I have heard that there was a tool that could be used to change the tler time or to disable it on this drives, in order to do this kind of thing.
Tler isnt going to help with linux software raid unless you need to continuosly write to the drive surveillance. Apr 14, 2016 with raid 0 being useless for data security and raid 5 being unavailable, creating a software raid 1 in windows 7 is the only viable option. But as of late, there has been a movement towards further separating the desktop and enterprise drives. In a degraded raid for example, see this post im quoting. Components in your hardware raid box may be top of line when you buy them but technology improves fast. Put on the hw raid card, make an array with them, use them a bit, shut down and pull the drives and see if none, one, or both have cctl tler enabled. Software raid does not suffer from such foolishness. A redundant array of inexpensive disks raid allows high levels of storage reliability. If you are going after high performance, you should be using ssds or hybrid drives, and make sure you match the performance of the drives to the performance of the bus. If youre doing jbod and let zfs get direct access to the disks, i believe tler can be dealt with.
Feb 05, 2011 ive been using the infamous wd green drives in win 7 and now vail rc using software raid 1 or as ms calls it mirroring for a while now without any of the tler issues that are associated with hardware raid. How important is tler, erc, cctl, etc on a synology nas. We get plenty of questions asking what raid edition drives actually. In a hardware raid setup, the drives connect to a special raid controller inserted in a fast pciexpress pcie slot in a motherboard. Currently, it seems the cheapest non smr drive availible is from shucking a my book which is likely to contain this drive, which doesnt have tler available. Its really a feature designed to prevent long retries causing a hardware raid controller to chuck a disk out of a set whereas most nass use mdadm, which is a software raid controller, but even though the nas will not chuck a disk after a few seconds, the tler is still useful in that it will prevent a disk suffering an unrecoverable read.
The question is that people talk a lot on so called trel problem, such as. With raid 0 being useless for data security and raid 5 being unavailable, creating a software raid 1 in windows 7 is the only viable option. Im curious to know if raidz2 will be more difficult to deal with tler, then say raid0 or 1, or 10 because of the additional time for parity calculation. We get plenty of questions asking what raid edition drives actually offer. While the hard drives called raid members are relatively small, slow, and unreliable, the resulting array can be large, fast, and reliable. Im curious to know if raid z2 will be more difficult to deal with tler, then say raid 0 or 1, or 10 because of the additional time for parity calculation. As the drive is not redundant, reporting segments as failed will only increase manual intervention. You may still use such controllers but please test them properly but only to provide sata ports with individual disks, the raid part should be handled by linux. Western digital 500gb sataii raid edition caviar se16 7200rpm 8. Centos hard disk recomendation for a software raid 5. What im unsure of is how well zfs can respond depending on the raid configuration. Tler is supported only on hardware raid and could lead to some kind of disaster on software raid andor desktop. Wdc tler time limited error recovery and linux kernel.
The danger in tler lies that if you lost your redundancy, then if a weak sector occurs that could be recovered, tler will force the drive to stop trying after 7 seconds. I used desktop disks in raid and sometimes my operating system went to the kernel panic state. Remember, onboard raid is software raid, it is not real hardware raid. Jul 07, 2009 a redundant array of inexpensive disks raid allows high levels of storage reliability. I didnt use intel rapid storage technology because i have western digital re disks that support tler i was inspired that dz77ga70k provides raid and bought re raidedition disks. Confused about tler for onboard raid raid cards and hbas. How to set up software raid 0 for windows and linux pc gamer. Assuming you had tler, after 7 seconds, it will instruct the raid adapter to not mark the drive bad and do it at a later time. So you absolutely do want tlerercetc for a hardware raid setup.
All that is relevant at the end of the day is what kind of timer if any the particular raid level uses, be it hardware raid or software raid. This section will mention some of the hardware concerns involved when running software raid. I think software raid is a little more forgiving than hardware raid. Creating a software raid 0 array on windows is really easy, and relatively painless. But the real question is whether you should use a hardware raid solution or a software raid solution. It is used to improve disk io performance and reliability of your server or workstation. Regardless, if you want to go ahead, go into the raid management software web page and tell it to make drive offline, prepare drive for removal, or replace drive depending on the brand of raid controller. Jun, 2016 in a hardware raid setup, the drives connect to a special raid controller inserted in a fast pciexpress pcie slot in a motherboard.
I configured software raid that my os provides windows 7. Regardless, if you want to go ahead, go into the raid management softwareweb page and tell it to make drive offline, prepare drive for removal, or replace drive depending on the brand of. Hard drive question for linuxmdadm is erctler required. Fortunately, it is easy to build a software raid 5 in windows 8. I have read that there should be a significant amount of tuning to the file system and drives themselves. What are linux scsi command timeouts and is the default. Festplatten trotz tlerfunktion einzeln betreiben ct magazin heise. Non tler drives with synology anecdotes or definitive answers welcome. If it didnt fix it by then, and you lost your redundancy, then tler is a harmful property instead of a useful one. I have four of the western digital caviar se16 500 gb wd5000aaks 16 mb sataii 300 mbs hard drive models. Ive been getting very good speeds as well as i move things around. Jun 18, 2010 its really a feature designed to prevent long retries causing a hardware raid controller to chuck a disk out of a set whereas most nass use mdadm, which is a software raid controller, but even though the nas will not chuck a disk after a few seconds, the tler is still useful in that it will prevent a disk suffering an unrecoverable read. The thing is, microsoft doesnt call it raid in windows 8, opting for storage spaces and storage.
We can build a raid with drives of unequal size, but then the smaller disk will dictate the arrays total capacity. Can someone give me the lowdown on wd blacks and windows. Raid redundant array of inexpensive disks or drives, or redundant array of independent disks is a data storage virtualization technology that combines multiple physical disk drive components into one or more logical units for the purposes of data redundancy, performance improvement, or both. Can i use consumer hard drives, that do not support tler erc cctl, with zfs software raid, without getting in trouble later on or do i. Up until windows 8, software raid in windows was a mess. Effectively, tler and similar features limit the performance of ondrive error handling, to allow hardware raid controllers and software raid implementations to. The only thing we can figure is that the 10,000 rpm drives are so fast that the onboard controller bottlenecks and causes a drive to drop out. Windows 7 has arbitrary restrictions on the available raid levels, and it was impossible to create a level 5 raid without windows server. In a software raid configuration whether or not tler is helpful is dependent on the operating system. And with desktopclass drives its a good idea to choose a model with tler so that a bad sector doesnt turn into a dropped drive. Western digital hat bis vor kurzem noch eine software namens wdtler. The tler question as you state isnt as relevant for raid 1 or 10.
Intel rapid storage technology enterprise nvme technical. One of the features of the raid edition drives could be unlocked on desktop drives through a simple program. These software raid controllers are generally more patient and wait significantly longer for drive response and execute more retries before. Mar, 2017 we get plenty of questions asking what raid edition drives actually offer. I was looking for it in the downloads section but i havent been able to locate it. Timelimited error recovery tler deutsch zeitbeschrankte fehlerkorrektur. It is absolutely true that this is a very important feature for hardware raid, because a hardware raid controller is probably configured to deem a hung hard drive as failed and to place it in an offline or recovery status, which has many negatives associated with it. Ive been using the infamous wd green drives in win 7 and now vail rc using software raid 1 or as ms calls it mirroring for a while now without any of the tler issues that are associated with hardware raid.
When storage drives are connected directly to the motherboard without a raid controller, raid configuration is managed by utility software in the operating system, and thus referred to as a software raid setup. Mar 26, 2015 creating a software raid 0 array on windows is really easy, and relatively painless. Non tler disks are still a pain in that theyll get prematurely dropped from the array on attempts to read a dodgy block, but readding the disk causes a resilver that essentially just replays the data written since the disk was last seen in the array, and not a fulldisk rebuild, which is much less stressful on the array, and also. Software raid does work and is reliable but in my experience rebuilding an array slows down the server performance to a crawl, making it nearly unusable which is what a raid should prevent. Software raid is a type of raid implementation that utilizes operating systembased capabilities to construct and deliver raid services. How to create a software raid 1 in windows 7 as we mentioned earlier, on a level 1 raid two disks have the exact copy of all the data at any single moment. What is also not clear is if the raid implementation in nas devices also support tler. This was in contrast to the previous concept of highly reliable mainframe disk drives referred to as. Western digital timelimited error recovery tler with. Depends on whether the drives fire up reliably and timeout. The assumption is that if one individual drive is having trouble with.
A raid can be deployed using both software and hardware. Zfs, and other software raid systems, will typically react the same way when tler is enabled, recovering data and remapping that block. That determines if tler cctlerc is really necessary or not. References to ide and scsi have been deleted, all recent drives are sata. Hitachi gst deskstar t7k500 500gb 7200rpm 16mb cache serial ata ii300 2. A curious reader recently posed this question, which ive edited to remove references to specific products and companies. I was thinking on buying 2 wd re4 harddrives, but to use as desktop drives, no raid.