This post is more than 5 years old
2 Posts
0
4292
September 17th, 2018 12:00
1 drive virtual disk - read without perc controller
Hi!
I have a R710 with a perc6i (soon to be 700), where because of the lack of jbod i created a virtual disk for every physical hard drive. i dont want to use hardware raid because of drive mix and match limitations, where unraid os gives me more freedom.
now if i want to plug that drive into a simple desktop machine for whatever reason (eg hardware failure of the server, but i need that data before the replacement part comes), would i be able to do that or is there a seperate layer created between os and filesystem which i would only be able to pass with a perc controller?
before you ask: yes, they are sata drives so i have the physical means to attach it ;)
0 events found
havisparco
2 Posts
0
September 18th, 2018 06:00
i just tried with my test system with success
config:
r710 with perc6i
all disks have their own raid0 virtual disk
os unraid
shutdown the server and plugged one of the unraid data drives (sata) to an external hdd adapter for ubuntu 16.4, which could read the contents of the disk just fine. so for my configuration and my usecase its working. heres hoping that the h700 will handle the disks the same way.
Daniel My
12 Elder
•
6.2K Posts
0
September 17th, 2018 14:00
Hello
There will be extra information on the disks, like tags that define the virtual disk. This extra information will likely create an offset that will cause the data to appear corrupted when read from a pass-through controller. I would not plan on moving disks between the PERC using any RAID level, including 0, and a pass-through controller.
Thanks
Dev Mgr
6 Operator
•
9.3K Posts
0
September 17th, 2018 20:00
One option is to not go with a PERC H700, but with an H200 or H310. These latter 2 support HBA mode if you cross flash them to IT mode, and then you can connect the drive to any other matching controller (SAS drives only support connecting to a SAS HBA, but SATA drives work on a SAS HBA or SATA controller).
Damago
1 Message
0
October 12th, 2020 13:00
In reply to post by dell engineer claiming such disk will be unreadable: Sorry this is not true.
1. You can create a filesystem on a disk using another computer, import it to mini perc h710 based raid controller, create a virtual volume of a type raid0 using the whole disk, reboot the server and YOU CAN MOUNT the filesystem without any problems.
2. You can even create (on a server array controller) a virtual volume of a size smaller than the whole disk on a server array controller, than format it inside the server os, move files to it, unmount, poweroff the server, physically remove the disk from DELL server, connect it to desktop PC, mount it into the os on a pc and access all files without any problem.
This is great news: mini perc h710 seems to leave disks clean enought so that they can be read outside.