我用4块800G的SSD盘做Raid 0后在系统上识别到为/dev/sdb,然后将/dev/sdb格式化成ext4后为/dev/sdb1,然后将该盘挂载给/data,在初始化该节点时,出现如下报错: fatal: [192.18.1.11]: FAILED! => changed=false msg: ‘fio mixed randread and sequential write test: randread iops of tikv_data_dir disk is too low: 7897 < 10000, it is strongly recommended to use SSD disks for TiKV and PD, or there might be performance issues.’
请问这里的错误是什么原因?