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买 RAID 卡前先避开三个坑

坑一：”RAID 卡只管硬盘，管不了 NVMe。” 传统 RAID 卡只能接管 SAS/SATA；而现代服务器的引导盘、热数据盘全是 NVMe。Dell PERC H965i 是三模（Tri-Mode）控制器——同一块卡同时接管 SAS、SATA 和 NVMe 直连设备，一个控制器管住整台服务器的存储栈，不再需要为 NVMe 另买一张 HBA。

坑二：”缓存越大越好，别管掉电保护。” 没有掉电保护的缓存是数据炸弹：突然断电时缓存里的数据全部丢失。H965i 的 8GB DDR4-3200 缓存配套电池备份单元（BBU），断电时把缓存内容刷入闪存——缓存越大越需要这个保护，这也是它带 BBU 版本贵得有道理的原因。

坑三：”端口越多越专业。” 端口数要匹配盘位拓扑：16 个内部端口刚好覆盖 16-24 盘位机箱的 SAS/NVMe 直连，再多就是浪费。按服务器盘位选卡，不按广告数字选。

Core Specifications

Attribute	Specification
Model	Dell PERC 12 series, H965i Front Internal
Mode	Tri-Mode: SAS / SATA / NVMe (direct connect) in one controller
Internal ports	16 ports (front)
Interface	SAS4, 22.5/24 Gbps per lane-class
Cache	8 GB DDR4-3200, with battery backup unit (BBU) option
RAID levels	0, 1, 5, 6, 10, 50, 60; non-RAID / HBA mode supported
Features	RAID level migration, hot spare, fast rebuild, self-encrypting drive support
Host interface	PCIe Gen4
Compatibility	PowerEdge R760 / R670 / R960 / R7715 and current rack family

Why Tri-Mode Changes the Storage Stack

Before tri-mode, a database node typically needed a RAID controller for SAS drives plus an NVMe HBA or direct-attach slots for flash – two cards, two drivers, two failure domains. With the H965i, one card presents SAS/SATA arrays and NVMe devices to the OS, and the PERC firmware handles RAID on the SAS/SATA side while NVMe passes through at native latency. That is the exact architecture Dell validates in the PowerEdge R960 (Front PERC H965i) and R670.

Dell PERC H965i PCIe RAID controller — PERC H965i: PCIe Gen4 tri-mode controller with 8GB cache – one card for SAS, SATA and NVMe.

RAID Levels and Operational Features

RAID 0/1/5/6/10/50/60 covers performance and parity layouts; non-RAID (HBA) mode passes disks through for software-defined storage.
RAID level migration lets you expand from RAID 1 to RAID 5/10 without rebuilding from scratch.
Hot spare and fast rebuild cut rebuild windows on large arrays.
Self-encrypting drive support keeps at-rest encryption on the drive layer.
Battery backup flushes cached writes to flash on power loss – data-safe caching.

Which Card for Which Chassis

Server	Controller fit
R670 / R960 / R760	Front PERC H965i (16-port, tri-mode)
R7715	PERC H365i / H965i / H975i (per config)
External storage	PERC H965e (external, with HBA355e/HBA465e options)

Pair the H965i with the BOSS-N1 boot module to keep OS boot off the data controller entirely.

Buying FAQ

Does it handle NVMe? Yes – tri-mode covers SAS, SATA and NVMe direct-attach.
Cache protection? 8GB DDR4-3200 with BBU battery backup option.
RAID levels? 0, 1, 5, 6, 10, 50, 60 plus non-RAID mode.
Ports? 16 internal ports – sized for 16-24 bay chassis.
Fits my server? Standard for current PowerEdge rack family (R760/R670/R960/R7715).

Upgrading or rebuilding storage? As an authorized Dell partner we supply PERC controllers, BOSS-N1 boot modules and compatibility-checked builds with factory-direct pricing, 3-year warranty and global shipping – contact us for a RAID configuration review.

Dell PERC H965i front controller with battery backup unit — Front controller kit with battery backup unit (G1RWV): cache is safe through power loss.

Detail: on 25+ bay or mixed SAS/NVMe builds, confirm port topology with our team – the 16-port H965i covers most rack layouts, and H965e handles external enclosures.