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It is being done by two RAID controllers (c0 and c1) so you must have some external storage that is dual-attached, MSA500 or a SAN are likely.
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It is being done by two RAID controllers (c0 and c1) so you must have some external storage that is dual-attached, MSA500 or a SAN are likely.

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No, <br />
There is only one dual channel controller, with 4 scsi disks forming RAID 5. 3 disks are active members and 1 is hot spare.<br />
The partitions used to mount till recently on c0d0p1, c0d0p2 and likes.<br />
Now they mount on c1d0p1, c1d0p2 and likes.<br />
The problem was discovered when the SWAP went missing as the SWAP partitions were still mentioned to be on c0d0 in fstab.<br />
fdisk /dev/cciss/c0d0 reported unable to read device. But the OS was running. It was later found upon running fdisk -l /dev/cciss/c1d0 that the partitions have moved from channel 0 to channel 1.
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No,
There is only one dual channel controller, with 4 scsi disks forming RAID 5. 3 disks are active members and 1 is hot spare.
The partitions used to mount till recently on c0d0p1, c0d0p2 and likes.
Now they mount on c1d0p1, c1d0p2 and likes.
The problem was discovered when the SWAP went missing as the SWAP partitions were still mentioned to be on c0d0 in fstab.
fdisk /dev/cciss/c0d0 reported unable to read device. But the OS was running. It was later found upon running fdisk -l /dev/cciss/c1d0 that the partitions have moved from channel 0 to channel 1.

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Forced accept.<br />
<br />
Computer101<br />
EE Admin
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Some please tell me what does it mean for a RAID controller to be dual active.<br />
I have noticed partitions on my Compaq DL380 server automatically move from /dev/cciss/c0d0 to /dev/cciss/c1d0.<br />
Could it be done by RAID controller as a failover?
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Some please tell me what does it mean for a RAID controller to be dual active.
I have noticed partitions on my Compaq DL380 server automatically move from /dev/cciss/c0d0 to /dev/cciss/c1d0.
Could it be done by RAID controller as a failover?

What is dual active raid controller

Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media used to retain digital data. In addition to local storage devices like CD and DVD readers, hard drives and flash drives, solid state drives can hold enormous amounts of data in a very small device. Cloud services and other new forms of remote storage also add to the capacity of devices and their ability to access more data without building additional data storage into a device.