Lenovo DM120S, Installation And Cabling Manual, Page: 14 / 70

and utilize newly qualified disk drives; therefore, avoiding system event messages about having non-
current disk drive information. You also avoid the possible prevention of disk partitioning because disk
drives are not recognized. The DQP also notifies you of non-current disk drive firmware.
Lenovo Data Center Support
• The best practice is to have the current versions of disk shelf (IOM) firmware and disk drive firmware on
your system before adding new disk shelves, shelf FRU components, or SAS cables. Current versions of
firmware can be found on the Lenovo Support Web site.
Lenovo Data Center Support
SAS cable handling considerations
• Visually inspect the SAS port to verify the proper orientation of the connector before plugging it in. The
SAS cable connectors are keyed. When oriented correctly into a SAS port, the connector clicks into place
and if the disk shelf power is on at the time, the disk shelf SAS port LNK LED illuminates green. For disk
shelves, you insert a SAS cable connector with the pull tab oriented down (on the underside of the
connector).
For controllers, the orientation of SAS ports can vary depending on the platform model; therefore, the
correct orientation of the SAS cable connector varies.
• To prevent degraded performance, do not twist, fold, pinch, or step on the cables. Cables have a
minimum bend radius. Cable manufacturer specifications define the minimum bend radius; however, a
general guideline for minimum bend radius is 10 times the cable diameter.
• Using Velcro wraps instead of tie-wraps to bundle and secure system cables allows for easier cable
adjustments.
Installing disk shelves with IOM12 modules for a hot-add
For each disk shelf you are hot-adding, you install the disk shelf into a rack, connect the power cords, power
on the disk shelf, and set the disk shelf ID before cabling the SAS connections.
About this task
For DM120S and DM240S, the video for this task is available at:
• Youtube: https://www.youtube.com/playlist?list=PLYV5R7hVcs-Bl5q5uqIV0US3rLklB5GOP
• Youku: https://list.youku.com/albumlist/show/id_51948223
For DM600S, the video for this task is available at:
• Youtube: https://www.youtube.com/playlist?list=PLYV5R7hVcs-BDPWjJVZFuHRfNWPEOhFWJ
• Youku:
https://list.youku.com/albumlist/show/id_51950116
Step 1. Install the rack mount kit (for two-post or four-post rack installations) that came with your disk shelf
using the installation flyer that came with the kit.
Attention: If you are installing multiple disk shelves, you should install them from the bottom to the
top of the rack for the best stability.
Do not flange-mount the disk shelf into a telco-type rack; the disk shelf's weight can cause it to
collapse in the rack under its own weight.
Step 2. Install and secure the disk shelf onto the support brackets and rack using the installation flyer that
came with the kit.
10
Installation and Cabling Guide for DM120S, DM240S, and DM600S