Joined Jul 2014
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Forum Thread
Synology Raid 0 Failure
July 16, 2020 at
08:28 AM
I see deals on hard drives on SD all the time. If I was to get a Synology 5 bay NAS DiskStation DS1019+, and setup raid 0. I want to backup everything I have on my computers to that backup storage being the synology NAS. If one of those drives fails out of 5, what happens? Do the clients, meaning my PCs start uploading the data that's missing in the backup now once I insert a working drive? All I see is fixes for RAID 5 and I get it. But I want to backup my PCs and not have to have raid 5 on top of that because then I have 3 copies. I want two copies, meaning my client and my backup storage. However, with raid 0 if it fails, how do the clients communicate with the backup storage when a new replaced drive is inserted? What happens? Thank you!
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Are you referring to Drive 0 in the Raid Array?
Is it Virtual Disk Group 0?
Is the RAID Level set to "RAID 0" vs. "RAID 5"?
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The reason why I ask is that:
If the RAID is let to Level 0 (RAID 0) then the Data is spread across all the drives in the disk group
The advantage is MAXIMUM Read and Write Speeds - Meaning they happen quickly, least amount of delay for very Disk intensive applications.
The Disadvantage is that if just one of the drives fails (Dies) then ALL YOUR DATA IS TOAST
So if you had 90 copies of the same data on the RAID 0, All 90 and Everything else is Gone!
RAID 5 Is slower on Reads and Writes, but you can loose a Drive without any data loss.
RAID 6 Allows for 2 drives to die before your data is in serious jeopardy.
RAID 10 Is Faster than 5 or 6, but requires 6 or more drives, but can survive 3 drive failures (and depending on the RAID controller Card, possibly 4 drives can fail before you lose data)
The Disadvantages to RAID 5/6/10 is that they need more drives but the amount of data you can store is less as some of the drives are HOT SPARES that don't count towards how much data you can store until they are called into action by a failure of a drive.
Think of it as you have 6 workers and 4 shovels...2 workers are just standing there, while the other 4 are digging with 1 shovel each. The 2 workers on standby are not doing any work but you still had to hire them and pay them as if they were performing work.
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BTW, you'd be better served if you post this in the Tech Forum instead of the Lounge...as you'll probably get OFF TOPIC answers, where that is kept to a minimum in the other sub-forum.
Splitting hairs here, but someone could buy 2 NAS stations and put both in RAID 0 configs and 1 backs the other one up, but even that would be damn risky since it only takes 1 drive failure to FUBAR the NAS.
Also...
With SSD's these days, the ole performance trick of RAID 0 on your desktop for the gaming rig speed really is a thing of the past at this point.
Splitting hairs here, but someone could buy 2 NAS stations and put both in RAID 0 configs and 1 backs the other one up, but even that would be damn risky since it only takes 1 drive failure to FUBAR the NAS.
Also...
With SSD's these days, the ole performance trick of RAID 0 on your desktop for the gaming rig speed really is a thing of the past at this point.
It was a bit of a struggle to get the suits to buy off on purchasing the VNX Array (Mix of SSD/15K/7.2K drives) to be used as the Primary Storage AND the Isilon for the Backup storage.
Until we put it bluntly as the VNX was agile and fast and the Isilon was Cheap and Deep did it finally click with them that they had two distinct purposes.
The DBA's now have a Pure all Flash array that their VM's live on.