Ids For Hot-Swap Drives - IBM System x3690 X5 Installation And User Manual

IDs for hot-swap drives

The hot-swap-drive ID that is assigned to each drive is printed on the front of the
server. The following illustrations show the location of the IDs of the drives. The
ID numbers and the drive bay numbers are the same.
Note:
1. The drive bay IDs can vary, depending on the combination of the SAS/SATA
backplanes installed in the server.
2. When upgrading drive backplane configurations, all 1.8-inch SSD drive
backplanes must be installed to the right of all 2.5-inch HDD or 2.5-inch SSD
drive backplanes. All 2.5-inch backplanes installs to the left of all 1.8-inch
backplanes.
3. When you mix 2.5-inch and 1.8-inch drive backplane configurations in the same
server, IMM resets the drive bay ID numbering by skipping bay ID numbers
based on the number of 2.5-inch drive backplanes that are installed to the left
of the 1.8-inch drives backplanes.
For example, if the server has a 4x2.5-inch. drive backplane and a 8x1.8-inch
backplane configuration, the drive bay IDs for the four drives in the 4x2.5-inch
drive backplane is 0 through 3. IMM assigns the drive bay IDs for the eight
drives in the 8x1.8-inch drive backplane to start with an ID of 8 through 15.
Since the drive bay IDs for the drives in the 4x2.5-inch backplane were 0
through 3, IMM reset the IDs by a gap of four (because the backplane supports
four drives), then the drive IDs in the 8x1.8-inch drive backplane starts with an
ID of 8 through 15. If a 8x2.5inch drive backplane had been installed, instead of
the 4x2.5-inch drive backplane, IMM would reset the IDs by a gap of eight,
then the drive IDs for the drives in the 8x1.8-inch drive backplane would start
at 16 through 23. See the following example illustrations and the illustrations in
"Supported SAS/SATA drive backplane configurations" on page 62 for more
information.
In the following illustration, the drive bay IDs are in sequential order because all
of the drive backplanes are 2.5-inch backplanes.
In the following illustration, you have a combination of drive backplanes. This
example shows a 2.5-inch drive backplane and a 1.8-inch drive backplane installed
in the server. In this instance, the drive bay IDs will require a gap in the bay ID
numbering between the drive IDs in the 2.5-inch and 1.8-inch drive backplanes.
0 1 2 3 8 9 10 11 12 13 14 15
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Chapter 2. Installing optional devices
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