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On 5/15/2014 1:26 AM, Radosław
Korzeniewski wrote:
I agree, however he says he is using a two-slot USB disk device. It depends on whether or not this device is a RAID device that mounts at a single mountpoint or two separate physical devices that mount at two different mountpoints. The mentioned virtual autochanger config will work perfectly if the device is a RAID or JBOD device. However if the two drives are presented to the system as two different physical devices then it is more involved because there will be two different mountpoints. Multiple mountpoints requires that the two Device resource definitions associated with the Autochanger resource use different Media Type values, and of course different Archive Device paths. Also, the various drives that will be inserted into the (SATA?) slots will have to somehow be made to mount at the correct mountpoint. This will have to be done externally to Bacula using udev or autofs or manual mounting. Each disk used in these slots must always be mounted at the same mountpoint. Otherwise, if the disks are mounted at first one and then the other they will end up containing volumes of both media types. This will get very confusing real fast. In any case, if there are a lot of disks that are swapped in and out of the two slots then it becomes tedious keeping track of which disk is needed when Bacula requests a particular volume be mounted. For these reasons I use the built-in virtual autochanger for fixed disk and vchanger for removable disk.
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