VNX5300-Storage Pool Offline

One of my customer's VNX storage pool has gone offline after a power failure. After reviewing the SPA_cfg_info.txt file, I noticed several luns with the info below, which is the cause of the Pool going offline. If so, I have two questions:

1. What does 87(Dead) mean?
2. Is there a way to remove this RG (115) from the pool and allow the Storage Pool to go online?

187 115 G SP-B RAID-6 134.2 GB RW- DEG 88(S:75)(EQZ:100%) 87(DEAD) 86(REB:100%) 85
188 115 G SP-B RAID-6 134.2 GB RW- DEG 88(S:75)(EQZ:100%) 87(DEAD) 86(REB:100%) 85
189 115 G SP-B RAID-6 134.2 GB RW- DEG 88(S:75)(EQZ:100%) 87(DEAD) 86(REB:100%) 85
190 115 G SP-B RAID-6 134.2 GB RW- DEG:PEER 88(S:75)(EQZ:100%) 87(DEAD) 86(REB:100%) 85
191 115 G SP-B RAID-6 134.2 GB RW- ->ENA 88(S:75)(EQZ:0%) 87(DEAD) 86(REB:0%) 85
192 115 G SP-B RAID-6 134.2 GB RW- DEG:PEER 88(S:75)(EQZ:0%) 87(DEAD) 86(REB:7%) 85
193 115 G SP-B RAID-6 134.2 GB RW- DEG 88(S:75)(EQZ:0%) 87(DEAD) 86(REB:2%) 85
194 115 G SP-B RAID-6 133.7 GB RW- DEG 88(S:75)(EQZ:0%) 87(DEAD) 86(REB:100%) 85