I have this in RAID 5 mode with 3 drives. Can I add a 4rth drive without losing data? Will it be added to the array or counted as the hotspare?
1737914
I asked Oyen Digital Tech Support this question (they are very responsive). This was their reply: "If a 3-drive RAID 5 set is created, and a 4th drive is added later, it will be a hot-spare drive. The Mobius does not have the ability to add the 4th drive to the original 3-drive set. The only way to accomplish this is to clear the original RAID and recreate a new 4-drive RAID 5 set." Back to me. Another option is to use software RAID. You would put the enclosure in JBOD ("Just a bunch of Disks") mode, and create your 3-drive RAID set with the software. Then when you add a 4th or a 5th drive it will either be treated as an independent drive, or can be part of yet another RAID set.
1974650
Yes just make sure whatever raid utility you choose can utilize 4tb partitions otherwise you'll have to have 16 2tb partitions. Also make sure not to use anything such as Western Digital Green drives that have auto off or time out features as it will break the array every time one of the drives powers down. I use Seagate Barracuda drives in mine.
558270
RAID 0,1 and SHR (Synology Hybrid Raid). With only 2 drives you can't get 5.
1048776
careful -- 2x 4TB in Raid 0 would mean total data loss in the event of 1 disk failure. You are essentially doubling your chances of complete data loss. You are far better to use RAID1 (even though it gets you just 4TB of disk storage), or get a different NAS to add multiple drives (3x 4TB in RAID5 = 8TB, or 4x 3TB = 9TB) so that you can have redundancy. MTBF shrinks when you get into bigger disks... and then doubling that risk by using them in RAID0 is asking for danger. Now, if you were just going to set up two separate 4TB drives, then that wouldn't be as big of a deal. Still no redundancy, but at least failure on one disk doesn't mean data loss on both. careful -- 2x 4TB in Raid 0 would mean total data loss in the event of 1 disk failure. You are essentially doubling your chances of complete data loss. You are far better to use RAID1 (even though it gets you just 4TB of disk storage), or get a different NAS to add multiple drives (3x 4TB in RAID5 = 8TB, or 4x 3TB = 9TB) so that you can have redundancy. MTBF shrinks when you get into bigger disks... and then doubling that risk by using them in RAID0 is asking for danger. Now, if you were just going to set up two separate 4TB drives, then that wouldn't be as big of a deal. Still no... » Read More careful -- 2x 4TB in Raid 0 would mean total data loss in the event of 1 disk failure. You are essentially doubling your chances of complete data loss. You are far better to use RAID1 (even though it gets you just 4TB of disk storage), or get a different NAS to add multiple drives (3x 4TB in RAID5 = 8TB, or 4x 3TB = 9TB) so that you can have redundancy. MTBF shrinks when you get into bigger disks... and then doubling that risk by using them in RAID0 is asking for danger. Now, if you were just going to set up two separate 4TB drives, then that wouldn't be as big of a deal. Still no redundancy, but at least failure on one disk doesn't mean data loss on both. « Show Less
1372204
Hi, you can to use in Raid SHR or Raid 5. You can go to this website and choose the best Raid for you. http://www.synology.com/support/RAID_calculator.php?lang=us
539945
Yes. The default raid setup will need to be disabled but it's not a problem. I have 2 drives raid 1 and another 2 drives raid 0. You can create a volume on a single drive too.
2147309
When I first got it (about 9 months ago), I started with 1 hard drive and it worked fine. I added another drive in single disk mode and it's also working fine. Although I didn't set it up as RAID, I remember I had a choice to turn it into RAID. However, I don't remember if formatting both drives is required for RAID; it's not required for two drives in single disk mode. This was a few updates ago, so it might have changed, but I think you can still start off with one drive, add another drive in the future, and set them up as RAID.
1730505
sorry for my first reply, hit the wrong key. it has included the hard disks, you will find it also without it so you can chose the hd size you want in it. i do not know if can be used in raid 1 or 5, sorry.
1235416
I put 5 each 3tb WD Red drives in my Thecus and set up a RAID 6. I think you can use any number of drives of any size. Just keep in mind that if you use RAID it will only be a percentage of the smallest drive in the array.
606995
It depends on the type of raid setup you use. There is a hybrid setup that makes use of all the drives and maximizes the space available. This way you can have different size drives. I accepted this as the default. I can't verify how it works though as all my drives are the same size. It's a bit slower than I would have liked also, but hey, it does the job.
1459205
It comes with the brackets to install all 4 drives, as to any hard drive I am not sure. They have a list of tested and recommended hard drives, there are a lot of mfgs and models. You also want to install in matching pairs at least and possibly all4 the same if you want to use certain RAID structures.
1302605
That is the theory of a RAID 5. I had a 4TB drive fail after a month on duty. Western Digital immediately sent me a new one, I plugged it in and it took about four days to re-establish the full RAID. My 16TB with 12 TB usable space on RAID 5 was loaded with 4TB of records. So, if you want to upgrade your system one drive at a time, better be patient.
639288
I am about to install a 6TB drive so I will let you know if I am successful but according to intel, it should be fine. The support of your HDD depends on the RAID card. This is a RAID expander and is only meant to extend an existing RAID controllers capacity of HDDs. This does not create a RAID array.UPDATE: I have installed my 6TB WD Red HDD and have no issues. Simply plugged it in, turned on my server, and it showed up in my OS (Linux Mint 17.1) without any issues. No configuration needed. Just plug and play.
993926
I believe so. I have a 5 drive raid at home & brought a new one home that I purchased for work & put the 5 drives in & the raid came right back. To me, this was VERY important if I ever have a failed Raid box. So in my case, it worked-but I did buy the 2 enclosures within a month of each other.
327902
No add them as you need them. You do need at least 2 or 3 (I don't remember which) for their flavor of RAID to work for data protection. Drives will be reformatted when inserted!
140742
You may have poor performance with that many disks simply because of the processing power required for an array that large. But there is no reason that this wouldn't work. If you're looking for a 16+ drive solution I would suggest something like the 2413+
2235680
Nope, that's only possible if you use XRAID (let the NAS auto handle the RAID levels). If you manually configure it as RAID1 initially using FlexRAID, you don't get the option to convert it to a RAID5 when you add in another disk later. You'll need to use at least 3 HDD to start with RAID5.