Dell PERC H700: how to replace a failed drive?

Question

linux

Hello! I have a Dell PowerEdge R815 with Ubuntu Server. It contains RAID1 for the system and RAID1 for data. Today I received a message that one of the system disks "fell" from the raid:

# /usr/sbin/megaclisas-status
-- Controller information --
-- ID | H/W Model            | RAM    | Temp | BBU    | Firmware     
c0    | PERC H700 Integrated | 512MB  | N/A  | REPL   | FW: 12.10.1-0001 

-- Array information --
-- ID | Type   |    Size |  Strpsz |   Flags | DskCache |   Status |  OS Path | CacheCade        |InProgress   
c0u0  | RAID-1 |     68G |   64 KB | ADRA,WT |  Default | Degraded | /dev/sda | Type : Read Only |None         
c0u1  | RAID-1 |    186G |   64 KB | ADRA,WT |  Default |  Optimal | /dev/sdb | None             |None         

-- Disk information --
-- ID  | Type | Drive Model                                     | Size     | Status          | Speed    | Temp | Slot ID  | LSI ID  
c0u0p0 | HDD  | HP DG072BABCE HPD5BSA5P8400NAW                  | 67. Gb   | Failed          | 3.0Gb/s  | 29C  | [32:0]   | 0       
c0u0p1 | HDD  | HP DG072BABCE HPD6BSA5P8400PPF                  | 67. Gb   | Online, Spun Up | 3.0Gb/s  | 27C  | [32:1]   | 1       
c0u1p0 | SSD  | BTHV71300B4L200MGN INTEL SSDSC2BA200G4 G2010150 | 185. Gb  | Online, Spun Up | 6.0Gb/s  | N/A  | [32:2]   | 2       
c0u1p1 | SSD  | BTHV71300ANT200MGN INTEL SSDSC2BA200G4 G2010150 | 185. Gb  | Online, Spun Up | 6.0Gb/s  | N/A  | [32:3]   | 3

I have an HP drive of a similar size (used somewhere before, possibly contains leftover data).
Questions such:
1) How to understand what physical disk should be changed? (I see that the very first in a row, but how to count - is it possible to somehow make it blink a light?)
2) How to directly replace it? Highly desirable without restarting the server

Answer 1

1) The error indicator will be lit on the basket of the failed disk, do not mix it up
2) Within a couple of minutes, the rebuild should start by itself.

Answer 2

1. Can be made to blink, yes
   All information is in the megacli manuals.