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Dell PowerEdge RAID Controller 11 User’s Guide PERC H755, H750, H355, and H350 Controller Series

Enumeration order for PERC H755 front SAS, PERC H755 front SAS, PERC H755N front NVMe, PERC H750 adapter SAS, and PERC H755 MX adapter

This section describes the order of enumerating PERC H-series controlers.

Steps

  1. Non-RAID disks are enumerated first based on slot ID.
  2. Virtual disks (VDs) are enumerated, second based on the virtual disk target ID. Target IDs are assigned to the VDs in the descending order when they are created. The first created VD is assigned the highest available target ID, and the last created VD is assigned the lowest available target ID. Therefore, the last created VD is discovered first by the operating system.
    NOTE:Operating system enumeration may not be in this order if virtual disks or non-RAID disks are created while the operating system is running. The operating system may name devices based on the order in which they were created resulting in the operating system enumeration changing after reboot. It is recommended to reboot the system for the final device enumeration after creating any virtual disks or non-RAID disks.

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