Business scenario and historical background
there is currently a customer with two servers and a wave storage system (AS1100H mainframe + expansion cabinet, about 20T of space) running a business system.
at the beginning of the project, due to financial problems, the customer only had one server, and there was no optical communication, directly through the left and right ports of the optical fiber to card 1 and card 2 of the server HBA card. Through the wave, their storage management software (Inspur SANTricity) set up a LUN group, and then don"t know how to set it in that server, but there is a block file called "yellow" under the / dev of the server that is running now.
then my predecessor suddenly left, and I didn"t know the customer had such a business system. Now the company says that the customer has added another server, but there is still no optical communication, and the customer requires the new server to be cold standby.
I haven"t touched the storage.
what I think, I don"t know if it"s right or not.
I first opened the storage system with SANTricity to have a look. Originally, there was only one group, and the host mapped one, binding the two optical fibers corresponding to the WWN number of the HBA card. Then there are no other settings.
I think because it is all for this group and also for this block file, my plan is not to add a new host, but to tie in the WWN numbers of the two HBA of the new host.
the wiring diagram is as follows:
configuration is
Storage
|-> Groups(1)
|-> Host(system123)
|-> type: Linux(DM-MP)
|-> Interface type: Fibre Channel
|-> Host port identifier: HBA1WWN
|-> Alias: port1
|-> Host port identifier: HBA2WWN
|-> Alias: port2
|-> Host port identifier: HBA1WWN
|-> Alias: cb-srv-port1
|-> Host port identifier: HBA2WWN
|-> Alias: cb-srv-port2
problems encountered
after starting with this setting, the new server still cannot scan the storage space. After entering the system, centos7 searched / dev and couldn"t find the block yellow (yellow is the name of this block seen under the old host / dev/).
what should I do?
I touch storage for the first time in my life. I basically don"t know anything, and I have no idea. All I know for sure is that I haven"t done anything yet. I have also heard my colleagues say that it is best not to mount this block at the same time. So all I want to do now is to find out the block of yellow.
as for how to do cold backup, I took a look at the configuration of the old server. The system they bought seems to back up the business system to the corresponding partition of yellow, so if the old server goes down, the new server can run as long as mount.
the customer is an agency unit, they have outsourced everything, this business system is done by another company, our company is the outsourced operation and maintenance, now there is no corresponding person, so push me out. Exercise.
I also hope that the elders will give us a lot of advice!