Can't change max_transfer for a VSCSI hdisk? Check your vtopt devices!
When attempting to change the max_transfer attribute on a VSCSI hdisk, the following error was displayed: #
chdev -l hdisk0 -a max_transfer= 0x100000 -P Method
error (/etc/methods/chgdisk):
0514-018 The values specified for the following attributes
are not valid: max_transfer
Maximum TRANSFER Size The
desired value, 0x100000, was an allowed value for this type of device (as shown
in the lsattr output below): #
lsattr -El hdisk0 PCM
PCM/friend/vscsi
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Tags:  rmdev vtopt0 max_transfer rmvdev aix vios chdev hdisk cd0 virtual_optical vio |