EMC损坏硬盘更换及恢复过程

更换EMC损坏的磁盘以后，盘阵会自动开始把hot spare备份的数据恢复过来。
然后把启用的hot spare盘恢复到初始备用状态。

我们可以通过命令来观察这一过程，首先看新换上来的硬盘，注意此时的状态为Equalizing，也就是正在进行平衡的过程:

# navicli -h 172.16.9.5 getdisk 1_0_1
Bus 1 Enclosure 0  Disk 1
Vendor Id:               SEAGATE 
Product Id:              ST373307 CLAR72 
Product Revision:        7A0A
Lun:                     6 
Type:                    6: RAID5 
State:                   Equalizing
Hot Spare:               6: NO 
Prct Rebuilt:            6: 100 
Prct Bound:              6: 100 
Serial Number:           3HZ6TL7F
Sectors:                 139681792 (68204)
Capacity:                68238
Private:                 6: 69704 
Bind Signature:          0x5cf2, 0, 1
Hard Read Errors:        0
Hard Write Errors:       0
Soft Read Errors:        0
Soft Write Errors:       0
Read Retries:     N/A
Write Retries:    N/A
Remapped Sectors:        N/A
Number of Reads:         980562
Number of Writes:        1107168
Number of Luns:          1
Raid Group ID:           3
Clariion Part Number:    DG118032459  
Request Service Time:    N/A
Read Requests:           980562
Write Requests:          1107168
Kbytes Read:             99788880
Kbytes Written:          70098518
Stripe Boundary Crossing: 2704586

此时hot spare盘的状态为Enabled,其替代的硬盘为:1_0_1

# navicli -h 172.16.9.5 getdisk 1_0_14
Bus 1 Enclosure 0  Disk 14
Vendor Id:               SEAGATE 
Product Id:              ST314680 CLAR72 
Product Revision:        7A0A
Lun:                     102 
Type:                    102: Hot Spare 
State:                   Enabled
Hot Spare:               102: YES 
Hot Spare Replacing:     1_0_1
....

当重算完成以后，1_0_1的状态变为Enabled

# navicli -h 172.16.9.5 getdisk 1_0_1
Bus 1 Enclosure 0  Disk 1
Vendor Id:               SEAGATE 
Product Id:              ST373307 CLAR72 
Product Revision:        7A0A
Lun:                     6 
Type:                    6: RAID5 
State:                   Enabled
Hot Spare:               6: NO 
......

而此时的hot spare盘状态重新变为:Hot Spare Ready，至此恢复过程彻底完成。

# navicli -h 172.16.9.5 getdisk 1_0_14
Bus 1 Enclosure 0  Disk 14
Vendor Id:               SEAGATE 
Product Id:              ST314680 CLAR72 
Product Revision:        7A0A
Lun:                     102 
Type:                    102: Hot Spare 
State:                   Hot Spare Ready
Hot Spare:               102: YES 
Hot Spare Replacing:     Inactive
....