某局点配置RH2288 V3服务器,客户在创建RAID时发现有的磁盘可以进行disk cache policy选择,有的是灰色,无法操作。 处理过程 1.确认配置的硬盘的类型,发现客户配置了SSD和普通的机械硬盘 2. 发现SSD盘disk cache policy都为灰色 3.经确认disk cache policy选项只对机械硬盘有用, SSD磁盘不需要修改,此选项为灰色。
Should I enable or disable write caching? When disk write caching is enabled, the data requests are stored on RAM instead of directly on the disk. This results in improved performance. But if this option is disabled, the computer has to write data directly on the disk which impacts the per...
1、如果是LSI的硬件RAID卡也就是说RAID卡带缓存的可以打开write back，这个时候数据写入有明显的提升，也就是数据先直接写入raid卡的缓存等IO空闲时在写入到硬盘。但是write back有一个不好的地方就是机器突然断电（RAID卡没有备份电池）情况下数据会丢失。如果是应用是一些核心数据建议不要开write back...
If you disable this policy setting, the system uses the NV cache to achieve faster boot and resume. The system determines the data that will be stored in the NV cache to optimize boot and resume. The required data is stored in the NV cache during shutdown and hibernate, respectively. This...
如果没有Write back就必须有UPS不间断电源 。不然突然断电会造成数据丢失。
● Disk cache policy ◦ Disabled: Disk caching is disabled. The drive sends a data transfer completion signal to the controller when the disk media has actually received all the data in a transaction. This process helps ensure data integrity in the event of a power f...
import com.huaweicloud.sdk.sms.v3.model.*; import java.util.List; import java.util.ArrayList; public class UpdateDiskInfoSolution { public static void main(String[] args) { // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. ...
Disk cache policy You can set disk cache policy as follows: ●Disabled:The disk cache is disabled. The drive sends a data transfer completion signal to the controller when the disk media has actually received all the data in a transaction. This process helps en...
Space management only works whenTiered Storageis enabled on all topics. Space management and the housekeeping process only considers removing data that is safely stored in Tiered Storage. The goal of space management is to utilize the local disk space as a cache. It works alongsideTiered Storageto...
Indicates the drive cache write policy. The value options are as follows: Write-Back (Enable): After the cache receives all data, the controller card sends the host a message indicating that data transmission is complete. Write-Through (Disable): After the drive receives all data, the controll...