NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
ReadyNAS RAID Configuration
Hello,
I'm trying to recover data from a ReadyNAS (not sure the model I only have access to the drives currently). It was originally a configured as X-RAID2, then was mistakenly re-configured by the user. I've done quite a number of complex RAID recoveries so I'm not looking for the usual comments about taking it to a "pro". :lol:
My question is, does X-RAID2 ever use a parity delay? Also what is the default stripe size...64Kb I assume? Also is the parity rotation left synchronous, right asynchronous, etc.?
Any details that can be provided will greatly speed up the process here. Due to it being reconfigured, I'm having to scan several Gb each time I change a setting just to get an idea where I stand. :roll:
I'm trying to recover data from a ReadyNAS (not sure the model I only have access to the drives currently). It was originally a configured as X-RAID2, then was mistakenly re-configured by the user. I've done quite a number of complex RAID recoveries so I'm not looking for the usual comments about taking it to a "pro". :lol:
My question is, does X-RAID2 ever use a parity delay? Also what is the default stripe size...64Kb I assume? Also is the parity rotation left synchronous, right asynchronous, etc.?
Any details that can be provided will greatly speed up the process here. Due to it being reconfigured, I'm having to scan several Gb each time I change a setting just to get an idea where I stand. :roll:
16 Replies
Replies have been turned off for this discussion
The older NV+ (RND4250 - no X) uses a dedicated parity disk (and hardware-accelerated raid). In those systems the parity drive has the OS partition but no data partition.Jared wrote: Wow, this thing is a real pain. I've eliminated every possible combination of RAID 5 using 8Kb, 16Kb, 32Kb, 64Kb, 128Kb with no success. There isn't a chance that this thing was using a fixed parity disk is there??? I've verified quite a number of sectors using XOR and it's definitely using parity. That, or the customer really isn't giving me the whole story here and something is way off.
If you think its possible that the customer got the wrong model number, you might find something useful in this guide: http://home.bott.ca/webserver/?p=306- Thanks, though I don't think that guide will be much help given that the customer re-configured and formatted. The current RAID 5 configuration is clear as day, it's the previous configuration I need to determine.
Got it.Jared wrote: Thanks, though I don't think that guide will be much help given that the customer re-configured and formatted. The current RAID 5 configuration is clear as day, it's the previous configuration I need to determine.
The "v1" sparc platforms (all the original Infrant ReadyNAS, NV+ v1, Duo v1, some rack mount units) all run 4.1.x firmware and use a dedicated parity disk.
The x86 platforms (NVX, ultra, pro, some rack mount units) run 4.2.x firmware and do not.- Is the current OS partition 4GB in size or 2GB in size? If it is 4GB in size then I don't think the model number is wrong.
- The current one is 4 Gb size. No idea what the original one was. Something is really screwy with it though. I've tried nearly every possible combination of RAID settings (literally checking them off a big chart one at a time) while scanning an area of the drive that's full of digital camera photos. But no matter what setting I use, it's all striped data. However if I compare the same sector in hex across all three drives the parity is right. It's as if it's using a parity delay or a different parity rotation, but that shouldn't be possible from what you guys are telling me.
- The original one would also have been 4GB. This confirms the model number the user gave you would be correct.
NETGEAR Academy
Boost your skills with the Netgear Academy - Get trained, certified and stay ahead with the latest Netgear technology!
Join Us!
