We are working with a hosting company for managing our dedicated servers. We asked for a replacement disk on one of the servers by providing the serial number. They took out 2 other disks instead and put them back in. When we asked for an explanation, they told us that it is very hard to read the serial number and they mistakenly took other disks out.
They also provided us a photo to show us that it is indeed very hard to read the serial number. It is here.
Is the only way to read the serial number peeking through the holes? This is the chassis.
EDIT: I have provided them the port number of the disk along with the serial number. They told me that they "think the controller cabling is mixed up or upside-down"
UPDATE: This is the final perspective of the DC.
Normally when our customer provides us with a controller port number and a serial we have all the required information to replace the disk. However in this case it appears that the wiring between the controller and the backplane in your server is incorrect. This is an unforseen event that should not happen.