描述
DELL H840 RAID Controller
Dell 的 PERC H840 RAID 控制器內建 RAID 控制功能，是一套穩定、高效能且具備容錯能力的磁碟子系統管理機制。 這款可擴充式 RAID 4GB 儲存容量，可提高伺服器系統的效能。 雙通道可提供高速連線能力。 本產品已通過 Dell 系統的測試和驗證，確保可以在您的電腦上正常運作。
裝置類型
存儲控制器 (RAID) – 可插拔卡
支援裝置
硬碟, 磁碟陣列 (RAID), 固態硬碟
適用於
PowerEdge R440, R540, R640, R740, R740xd, R7415, R7425, R940, T440, T640
| PERC H840 | |
| RAID levels | 0, 1, 5, 6, 10, 50, 60 |
| Non-RAID | N/A |
| Enclosures per port | 4 |
| Processor | Dell adapter SAS RAID-on-chip, 8-port with LSI 3508 chipset |
| Battery backup unit | Yes |
| eHBA | No |
| LKM security | Yes |
| Controller queue depth (RAID mode) | 4096 with PD64 profile, 3072 with PD240 profile |
| Controller Queue Depth (eHBA) | No |
| Enterprise key manager mode | No |
| Nonvolatile cache | Yes |
| Cache memory | 8 GB DDR4 2133 Mhz cache |
| Cache function | Write back, write through, no read ahead, and read ahead. |
| Max no of VDs in RAID mode | 240 |
| Max no of disks in eHBA mode | Not applicable |
| Max no of VDs per disk group | 16 |
| Max no of disk groups | 240 |
| Hot swap devices supported | Yes |
| Hardware XOR engine | Yes |
| Online capacity expansion | Yes |
| Dedicated and global hot spare | Yes |
| Autoconfigure | RAID 0 |
| Drives types | 6 Gbps SAS, and 12 Gbps SAS |
| VD strip size | 64 kB, 128 kB, 256 kB, 512 kB, 1 MB |
| PCIe support | Gen 3 |
| Maximum drive support | 240 |
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