1. What happens if I just remove one of the 4 physical drives configured RAID5 in the R900? Do I lose data? Does it crash the system? What happens? In OpenManage, what is the purpose of the reconfigure task on the RAID 5 virtual disk?
RAID 5 is n+1, if you have a 4 drive RAID 5 and remove 1 drive it will go into a degraded state. The system will continue operating normally. If you have a second drive go offline the virtual disk will go into a failed state and the data will be inaccessible.
Reconfigure operations allow you to change the size of a virtual disk by either using existing space on disks or adding disks. You can read more about reconfigure operations in the OpenManage Server Adminstrator manuals. There is an OMSA storage manual that has a reconfigure section.
2. The drive I remove from the R900 has data on it. Can I just put it in the slot of the failed RAID1 drive in the R510? The fact that the drive comes from a different machine with a different controller . . . does that matter?
Yes, it matters. The PERC6i and H700 write virtual disk tags on each disk in a virtual disk. This information describes the virtual disk. It has information like the size, RAID level, and number of disks. The controller also stores information about known virtual disks in its local memory. If it detects these descriptors on a disk but the virtual disk information is a mismatch or nonexistant on the controller then it will be flagged as a foreign disk. You will need to either import or clear the foreign configuration. An import will copy the virtual disk information from the drive to the controller. A clear will delete the virtual disk descriptors or metadata tags from the disk. Once the disk is cleared it should go to a ready state. You can then set it as a hot spare to initiate a rebuild. You can read more about foreign configurations in the storage controller manual.
Daniel My
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6.2K Posts
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September 7th, 2018 10:00
Hello
RAID 5 is n+1, if you have a 4 drive RAID 5 and remove 1 drive it will go into a degraded state. The system will continue operating normally. If you have a second drive go offline the virtual disk will go into a failed state and the data will be inaccessible.
Reconfigure operations allow you to change the size of a virtual disk by either using existing space on disks or adding disks. You can read more about reconfigure operations in the OpenManage Server Adminstrator manuals. There is an OMSA storage manual that has a reconfigure section.
http://www.dell.com/openmanagemanuals/
Yes, it matters. The PERC6i and H700 write virtual disk tags on each disk in a virtual disk. This information describes the virtual disk. It has information like the size, RAID level, and number of disks. The controller also stores information about known virtual disks in its local memory. If it detects these descriptors on a disk but the virtual disk information is a mismatch or nonexistant on the controller then it will be flagged as a foreign disk. You will need to either import or clear the foreign configuration. An import will copy the virtual disk information from the drive to the controller. A clear will delete the virtual disk descriptors or metadata tags from the disk. Once the disk is cleared it should go to a ready state. You can then set it as a hot spare to initiate a rebuild. You can read more about foreign configurations in the storage controller manual.
http://www.dell.com/storagecontrollermanuals/
Thanks