Drive bay numbering is shown in the following figures.
Figure 16: Small Form-Factor Drive (24-Drive) Versions, Drive Bay Numbering
Figure 17: Small Form-Factor Drive (8-Drive) Version, Drive Bay Numbering
Figure 18: Large Form-Factor Drive (12-Drive) Version, Drive Bay Numbering
Observe these drive population guidelines for optimum performance:
•
When populating drives, add drives to the lowest-numbered bays first.
For diagrams of which drive bays are controlled by particular controller cables on the
backplane, see Storage Controller Cable Connectors and Backplanes, on page 133.
Note
•
Keep an empty drive blanking tray in any unused bays to ensure proper airflow.
•
You can mix SAS/SATA hard drives and SAS/SATA SSDs in the same server. However, you cannot
configure a logical volume (virtual drive) that contains a mix of hard drives and SSDs. That is, when
you create a logical volume, it must contain all SAS/SATA hard drives or all SAS/SATA SSDs.
4K Sector Format SAS/SATA Drives Considerations
•
You must boot 4K sector format drives in UEFI mode, not legacy mode. See the procedures in this
section.
•
Do not configure 4K sector format and 512-byte sector format drives as part of the same RAID volume.
Cisco UCS C240 M5 Server Installation and Service Guide
47
Maintaining the Server
Replacing Front-Loading SAS/SATA Drives