Dell PERC 4e/DC U320 64-bit SCSI PCI-E RAID Controller 128MB TD977


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Product Overview

The PERC 4e/DC RAID controller is a high-performance, PCI-E to SCSI host adapter with RAID capabilities. It provides reliable fault-tolerant disk subsystem management and is an ideal RAID solution with Dell PowerEdge systems. The RAID controller offers a cost-effective way to implement RAID in an external enclosure.

Designed for host servers with an open PCI-e slot.

Dell Part Number(s): TD977, 0TD977, X6847

Possible Applications: Use to connect a Dell PowerVault 220S or 221S external direct-attached storage array to a Dell PowerEdge server with a PCI-E riser slot.


  • RAID levels 0, 1, 5, 10, and 50
  • SCSI channels 2
  • Array interface to host PCI Express Rev. 1.0a
  • Storage interface SCSI U320
  • Cache memory size 128 MB SDRAM
  • Cache function Write-back, write-through, adaptive read-ahead, non read-ahead, read-ahead
  • Cache battery backup Yes
  • Number of logical drives and arrays supported Up to 40 logical drives and 32 arrays per controller
  • Maximum logical drive size supported 2 TB for all RAID levels (0, 1, 5, 10, and 50)
  • Online capacity expansion Yes
  • Hot spares Yes
  • Flashable firmware Yes
  • Hot swap devices supported Yes
  • Non-disk devices supported NOTE: PERC 4 does not support any non-disk devices except backplanes. Only SAF-TE and SES
  • Mixed capacity hard drives Yes
  • Number of 16-bit internal connectors 2
  • Number of 16-bit external connectors 2
  • Cluster support Yes

Warranty Information

90-day parts replacement warranty


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