Appliance Mode - Failed to hot-add SCSI targets: Failed to power on scsi

Appliance Mode fails with the error: 

[timestamp] <17> Info           [AP] (Client) output: [2011-03-10 06:25:20.868 02600 verbose 'transport'] Mounting VM vim.VirtualMachine:vm-172 using transport hotadd failed : Failed to hot-add SCSI targets: Failed to power on scsi0:x.\n
[timestamp] <17> Info           [AP] (Client) output: Failed to add disk scsi0:8..\n

1. Typically this means VMFS blocksize of datastore that stores the Veeam virtual machine is smaller than what is supported for disk that is mounting to Veeam Console for backup. 

Block Size	Largest virtual disk on VMFS-2	Largest virtual disk on VMFS-3
1MB	456GB	256GB
2MB	912GB	512GB
4MB	1.78TB	1TB
8MB	2TB	2TB

2. Sometimes this error can be seen when the backed up machine has two or more equally named disks.

1. Simply use the largest VMFS blocksize datastore in your infrastructure to house the Veeam virtual machine.  This guarantees that no disk in your environment will be too large for the datastore to support this hotadd mount of that disk.

2. Rename the disks and re-create the job:

http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&docType=kc&externalId=1002491&sliceId=2&docTypeID=DT_KB_1_1&dialogID=164036717&stateId=1%200%20164040343

Please reference the following VMware Knowledge Base Articles for further information.

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1003565

http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&docType=kc&externalId=1002491&sliceId=2&docTypeID=DT_KB_1_1&dialogID=164036717&stateId=1%200%20164040343