Dell Compellent SSDs
Replace a Dell Compellent SSD with the endurance class and capacity of the drive you are retiring, read-intensive (RI), mixed-use (MU) or write-intensive (WI); the -CML part numbers mark the versions sold for Dell Compellent SC Series arrays. Compellent SSDs are 2.5-inch SAS drives at 6Gb/s and 12Gb/s, from smaller write-intensive capacities up to multi-terabyte read-intensive drives, self-encrypting (SED) models included. Our RI vs MU vs WI guide and DWPD vs TBW guide explain the classes; drives and controllers for the same Compellent arrays are under Compellent Hard Drives and Compellent Controllers.
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Dell Compellent DGTT2-CML 1.6TB SAS SSD 2.5" 12Gbps RI Solid State DriveAvailability: Only 4 leftManufacturer: Dell Condition: Refurbished 1 Year WarrantyBuy Now$279.99 - Dell Compellent XRC7G-CML 400GB SLC SAS SSD 2.5" 6Gbps WI Solid State DriveAvailability: Available by QuoteManufacturer: Dell Condition: Refurbished 1 Year WarrantyRequest PricingOut of stock
- Dell Compellent 2VY8H-CML 3.84TB SAS SSD 2.5" 12Gbps RI Solid State DriveAvailability: Available by QuoteManufacturer: Dell Condition: Refurbished 1 Year WarrantyRequest PricingOut of stock
- Dell Compellent V1R9K-CML 800GB MLC SAS SSD 2.5" 12Gbps MU Solid State DriveAvailability: Only 3 leftManufacturer: Dell Condition: Refurbished 1 Year WarrantyBuy Now$128.99
SSD tiers in Storage Center
Storage Center sorts drives into tiers by speed, and the SSD class decides which tier a drive joins. Dell's SC Series RAID guide gives the typical placement:
| SSD class | Typical Storage Center tier (Dell) | Interface and size |
|---|---|---|
| Write-intensive (SSD-WI) | Tier 1, the best-performing tier | 2.5-inch SAS |
| Read-intensive (SSD-RI) | Tier 2; Tier 1 when the system has no write-intensive SSDs | 2.5-inch SAS |
| Other SSD types, mixed-use included | Tier 1 when no write-intensive SSDs are present, otherwise any tier | 2.5-inch SAS |
In a flash-plus-disk system, 15K hard drives drop to Tier 2 or 3 once SSDs are present, and Dell's guide keeps 7.2K drives in Tier 3. Replace a failed SSD with one of the same class so the tier keeps its write budget, and size spares the same way: Storage Center sets aside one hot spare for every drive class in a 2U enclosure.
Firmware and enclosures
Storage Center takes Dell's own drive versions: Dell's SC5020 manual has the system ship with, and support, Enterprise Plus drives, and the -CML suffix marks the SSDs sold for these arrays. On the all-flash SC5020F only SSDs are supported, with at least four installed, while the hybrid SC5020 mixes hard drives and SSDs across its 30 internal 2.5-inch bays, and an SC420 expansion enclosure adds 24 more 2.5-inch bays for SAS hard drives or SSDs. SSDs for other array families are on storage array SSDs.
