即使没有电池备份，我也试图在Smart Array P400上启用写入caching。 我们有一个由发电机支持的大型build筑物UPS，所以电力消耗的可能性很小，而且在这台VM主机服务器上的写入性能很糟糕。 我已经安装了HP VMware驱动程序和软件，并且使用hpssacli打开了写入caching和无电池写入caching：
/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 但是，正如您所看到的，写入的高速caching比率为0％。 我错过了什么？
看起来这看起来像你在找什么：
ctrl slot=0 cacheratio=50/50
来源： https ： //community.hpe.com/t5/ProLiant-Servers-ML-DL-SL/Smart-Array-Controller-P400-cache-ratio/td-p/4018686
这是一个俗气的解决scheme。
惠普智能arraysP400并没有真正兑现无电池caching覆盖设置。
你可以尝试find一个电池，但服务器是如此古老，没有人有一个新的健康的电池库存。
而且由于这一代服务器的价值大约是100美元，这是一个艰难的使用案例。
你确定要运行这个特定的服务器吗？