Marcos, > WWID composed from VPD data from device, specifically page 0x83. So, > when a device does not have VPD support, for example USB storage > devices where VPD is specifically disabled, a read into <blk > device>/device/wwid file will always return ENXIO. To avoid this, > change the scsi_sdev_attr_is_visible function to hide wwid sysfs file > when the devices does not support VPD. Not a big fan of attribute files that come and go. Why not just return an empty string? Hannes? -- Martin K. Petersen Oracle Linux Engineering
