我正在尝试在 Smart Array P400 上启用写入缓存，即使没有电池备份。我们有一个大型建筑物范围的 UPS，由发电机备份，因此断电的可能性很小，并且此 VM 主机服务器上的写入性能很差。我已经安装了 HP VMware 驱动程序和软件，并使用 hpssacli 启用了写入缓存和无电池写入缓存：
/opt/hp/hpssacli/bin # ./hpssacli controller slot=1 show config detail
Smart Array P400 in Slot 1
Bus Interface: PCI
Slot: 1
Serial Number: PAFGK0P9VX029O
Cache Serial Number: PA82C0J9VX12T7
RAID 6 (ADG) Status: Disabled
Controller Status: OK
Hardware Revision: E
Firmware Version: 7.22
Rebuild Priority: Medium
Expand Priority: Medium
Surface Scan Delay: 15 secs
Surface Scan Mode: Idle
Wait for Cache Room: Disabled
Surface Analysis Inconsistency Notification: Disabled
Post Prompt Timeout: 0 secs
Cache Board Present: True
Cache Status: OK
Cache Ratio: 100% Read / 0% Write
Drive Write Cache: Enabled
Total Cache Size: 256 MB
Total Cache Memory Available: 208 MB
No-Battery Write Cache: Enabled
Battery/Capacitor Count: 0
SATA NCQ Supported: True
Number of Ports: 2 Internal only
Encryption Supported: False
Driver Version: 3.6.14
Driver Supports HP SSD Smart Path: False
Internal Drive Cage at Port 1I, Box 1, OK
Power Supply Status: Not Redundant
Serial Number:
Drive Bays: 4
Port: 1I
Box: 1
Location: Internal
Physical Drives
physicaldrive 1I:1:7 (port 1I:box 1:bay 7, SATA, 250 GB, OK, spare)
physicaldrive 1I:1:6 (port 1I:box 1:bay 6, SATA, 250 GB, OK)
physicaldrive 1I:1:5 (port 1I:box 1:bay 5, SATA, 250 GB, OK)
Internal Drive Cage at Port 2I, Box 1, OK
Power Supply Status: Not Redundant
Serial Number:
Drive Bays: 4
Port: 2I
Box: 1
Location: Internal
Physical Drives
physicaldrive 2I:1:4 (port 2I:box 1:bay 4, SATA, 250 GB, OK)
physicaldrive 2I:1:3 (port 2I:box 1:bay 3, SATA, 250 GB, OK)
physicaldrive 2I:1:2 (port 2I:box 1:bay 2, SATA, 250 GB, OK)
physicaldrive 2I:1:1 (port 2I:box 1:bay 1, SATA, 120 GB, OK)
Array: A
Interface Type: SATA
Unused Space: 0 MB
Status: OK
Array Type: Data
Logical Drive: 1
Size: 111.8 GB
Fault Tolerance: 0
Heads: 255
Sectors Per Track: 32
Cylinders: 28722
Strip Size: 128 KB
Full Stripe Size: 128 KB
Status: OK
Caching: Enabled
Unique Identifier: 600508B10010503956583032394F0009
Logical Drive Label: A0199599PAFGK0P9VX029O81A9
Drive Type: Data
LD Acceleration Method: Controller Cache
physicaldrive 2I:1:1
Port: 2I
Box: 1
Bay: 1
Status: OK
Drive Type: Data Drive
Interface Type: SATA
Size: 120 GB
Native Block Size: 512
Firmware Revision: HPG2
Serial Number: K647T8B25P5U
Model: ATA GJ0120CAGSP
SATA NCQ Capable: True
SATA NCQ Enabled: True
Current Temperature (C): 33
Maximum Temperature (C): 58
PHY Count: 1
PHY Transfer Rate: 1.5Gbps
Array: B
Interface Type: SATA
Unused Space: 0 MB
Status: OK
Array Type: Data
Spare Type: dedicated
Logical Drive: 2
Size: 931.4 GB
Fault Tolerance: 5
Heads: 255
Sectors Per Track: 32
Cylinders: 65535
Strip Size: 64 KB
Full Stripe Size: 256 KB
Status: OK
Caching: Enabled
Parity Initialization Status: Initialization Completed
Unique Identifier: 600508B10010503956583032394F000A
Logical Drive Label: A01986FDPAFGK0P9VX029O8FA7
Drive Type: Data
LD Acceleration Method: Controller Cache
physicaldrive 1I:1:5
Port: 1I
Box: 1
Bay: 5
Status: OK
Drive Type: Data Drive
Interface Type: SATA
Size: 250 GB
Native Block Size: 512
Firmware Revision: HPG2
Serial Number: K648TAC28P4N
Model: ATA GJ0250EAGSQ
SATA NCQ Capable: True
SATA NCQ Enabled: True
Current Temperature (C): 35
Maximum Temperature (C): 58
PHY Count: 1
PHY Transfer Rate: 1.5Gbps
physicaldrive 1I:1:6
Port: 1I
Box: 1
Bay: 6
Status: OK
Drive Type: Data Drive
Interface Type: SATA
Size: 250 GB
Native Block Size: 512
Firmware Revision: HPG2
Serial Number: K648T8C25MF2
Model: ATA GJ0250EAGSQ
SATA NCQ Capable: True
SATA NCQ Enabled: True
Current Temperature (C): 34
Maximum Temperature (C): 58
PHY Count: 1
PHY Transfer Rate: 1.5Gbps
physicaldrive 2I:1:2
Port: 2I
Box: 1
Bay: 2
Status: OK
Drive Type: Data Drive
Interface Type: SATA
Size: 250 GB
Native Block Size: 512
Firmware Revision: HPG2
Serial Number: K648T8C25MFW
Model: ATA GJ0250EAGSQ
SATA NCQ Capable: True
SATA NCQ Enabled: True
Current Temperature (C): 35
Maximum Temperature (C): 58
PHY Count: 1
PHY Transfer Rate: 1.5Gbps
physicaldrive 2I:1:3
Port: 2I
Box: 1
Bay: 3
Status: OK
Drive Type: Data Drive
Interface Type: SATA
Size: 250 GB
Native Block Size: 512
Firmware Revision: HPG2
Serial Number: K648T8B25M9W
Model: ATA GJ0250EAGSQ
SATA NCQ Capable: True
SATA NCQ Enabled: True
Current Temperature (C): 35
Maximum Temperature (C): 58
PHY Count: 1
PHY Transfer Rate: 1.5Gbps
physicaldrive 2I:1:4
Port: 2I
Box: 1
Bay: 4
Status: OK
Drive Type: Data Drive
Interface Type: SATA
Size: 250 GB
Native Block Size: 512
Firmware Revision: HPG2
Serial Number: K648T8C25ML9
Model: ATA GJ0250EAGSQ
SATA NCQ Capable: True
SATA NCQ Enabled: True
Current Temperature (C): 35
Maximum Temperature (C): 58
PHY Count: 1
PHY Transfer Rate: 1.5Gbps
physicaldrive 1I:1:7
Port: 1I
Box: 1
Bay: 7
Status: OK
Drive Type: Spare Drive
Interface Type: SATA
Size: 250 GB
Native Block Size: 512
Firmware Revision: HPG2
Serial Number: K648T8C25MK0
Model: ATA GJ0250EAGSQ
SATA NCQ Capable: True
SATA NCQ Enabled: True
Current Temperature (C): 31
Maximum Temperature (C): 57
PHY Count: 1
PHY Transfer Rate: 1.5Gbps
但如您所见，写入的缓存比率为 0%。我遗漏了什么？
答案1
看起来这就像您正在寻找的东西：
ctrl slot=0 cacheratio=50/50
答案2
这是一个棘手的解决方案。
HP Smart Array P400 实际上并不遵守无电池缓存覆盖设置。
- 但是使用 Smart Array P400 意味着您正在使用 HP ProLiant G5 服务器...
- 这意味着你正在使用 2005-2008 年间的东西……已经有 10 年了。
- 这表明您正在运行 VMware 不再支持的程序……
- 并且 SATA 驱动器在该控制器上将其速度降低至 1.5Gbps（而不是 3Gbps 或 6Gbps）；仅为 SAS 驱动器速度的一半……
- 这意味着您的性能会非常非常差......即使有写入缓存。
您可以尝试寻找电池，但是服务器太旧了，没有人有新的健康电池的库存。
而且由于街头价值该代服务器的价格约为 100 美元，这是一个艰难的用例。
您确定要运行该特定服务器吗？