The drive locations are also marked on the enclosure itself. The rows (A-G) are
marked on the left and right edges of the enclosure. The columns (1-14) are
marked on the front edge of the enclosure. The row and column marks are
visible when the top cover is removed.
5. Slide the release latch forward (▌1▐), as shown in Figure 109 on page 117.
Figure 108. Drive locations in a 2145-92F expansion enclosure
116 SAN Volume Controller: Model 2145-SV1 Hardware Installation Guide