??????RAID5???????????5???????

RAID5?????????????????????,???????????,RAID5?????????,???????????????????????RAID5????????????5???????????

???????????

????????????36???,???????DELL PowerEdge R730,??6?4TB SAS????RAID5??,???20TB???????SQL Server???,???5?????????????????????,???????????????

1.1 ??????

?????????,?????????3???????????offline??????????,???????????????????????,???????????3???,??????????????30%?,?5???????????????????,??RAID5??????,?????????????

1.2 ???????????

• ???????????????????????
• ???????5???????????
• ?????????????,?????????

??????????

2.1 ??????

???????,?????????????,?6????????????:

• ?1?2?4?6???:??????,?????
• ?3???:??????,???????
• ?5???:????,???,??????

2.2 ??????

?????????,?????????:

• ????:?????????????????
• ?3???:????????,??????+??????,????????
• ?5???:???????????????????

??RAID?????????

3.1 ?????(?1-8??)

?5????Class 100??????????,?????????????????????????,????????,????98.7%??????

3.2 RAID????(?8-16??)

?????????????,???????????????,??RAID5?????:

• ????:64KB
• ????:1-2-3-4-5-6
• ???/????:???
• ????:????

3.3 ??RAID??(?16-48??)

????RAID????,?????????????RAID??,?6??????????????????3?????????5???????,??RAID5????????????????

3.4 ????????(?48-72??)

???RAID???SQL Server?????,??????????,???????????????????????????,????????????DBCC CHECKDB???

??????

??72??????,??????:

• 5???????????,???99.6%
• ?????????100%
• ???????99.2%
• ?????????100%

???????????????,?????????

??????

• RAID5????,?????????????????
• ????????????????,?????????????
• ??????????????????????
• ????????????,RAID????????