Hi all and thanks in advance and apologies for the long upfront story.
I am, to say the least, inexperienced with VMware. A company I've had a consulting relationship on and off with for 10 years or so decided 12 months ago to virtualise their environment.
The decision was mostly driven by DR considerations, but there would be other benefits as well.
Unfortunately they chose a local IT provider to perform the system conversion and to be polite about it, they did a piss poor job.
They implementation took longer than expected, there were numerous issues of down time, things didn't work as advertised and so on.
At the start of the year they brought me in to look over things and move things forward. I've got a good overview of modern IT systems and have been in the business for 25+ years. Virtualisation is something I've been aware of, just never really dealt with.
I got a couple of contractors in deal with the initial mess - one to tidy things up as best he could and another for a general audit and planning. The core problem (apart from very basic mistakes in configuration like not taking into account actual required performance, leaving over sized disks in place, massive over commitment of vCPUs and memory) was the storage back end. They'd tried to use a Synology NAS for all back end storage. Their initial configuration didn't even have a separated or vlan'd iSCSI network. However, with running 12 servers (including 2 database servers and 1 exchange server) performance was very poor and once Veeam backups started trampling things would get much worse with ongoing consolidation issues, lagging backup running into production time, servers stunned every which way and so on...
The actual VMware system is a pair of Dell R430s in a HA Cluster, with a similar setup at the DR site. During a normal running day, the servers are balanced with across the pair of esx hosts.
Ok, I've painted my picture!
We had the worst of the configuration issues fixed, and last weekend I installed an MSA2040 with 2 x 16Gb Fibre channel in each controller, and a dual 16Gb (2662?) card in each ESX host. One cable from each controller to each esx host - not FC switch.
The migration work took about 24 hours, and everything is just so much better, more than 5 times the speed across the board and everything steady and stable.
Why did I do the installation? Costs, basically. It seemed like something well within my grasp (after months of studying and examining the systems and options) and not overly complex.
I'm looking at things now and I notice that on host 2 everything shows as multipath Ok, and on host 1 things show as degraded (or Partial/No redundancy).
I would swear I've done nothing different between the two hosts, and the MSA 2040 SMU shows all 4 FC connections as active.
So what am I doing wrong? Or what else am I missing? All input very much appreciated.
Esxcfg-scsidevs -l shows this on
host 1
naa.600c0ff00026e0890000000000000000
Device Type: Enclosure Svc Dev
Size: 0 MB
Display Name: HP Fibre Channel Enclosure Svc Dev (naa.600c0ff00026e0890000000000000000)
Multipath Plugin: NMP
Console Device: /vmfs/devices/genscsi/naa.600c0ff00026e0890000000000000000
Devfs Path: /vmfs/devices/genscsi/naa.600c0ff00026e0890000000000000000
Vendor: HP Model: MSA 2040 SAN Revis: G210
SCSI Level: 6 Is Pseudo: false Status: on
Is RDM Capable: true Is Removable: false
Is Local: false Is SSD: false
Other Names:
vml.020d000000600c0ff00026e08900000000000000004d5341203230
VAAI Status: unsupported
naa.600c0ff00026e0897718f55601000000
Device Type: Direct-Access
Size: 3999708 MB
Display Name: HP Fibre Channel Disk (naa.600c0ff00026e0897718f55601000000)
Multipath Plugin: NMP
Console Device: /vmfs/devices/disks/naa.600c0ff00026e0897718f55601000000
Devfs Path: /vmfs/devices/disks/naa.600c0ff00026e0897718f55601000000
Vendor: HP Model: MSA 2040 SAN Revis: G210
SCSI Level: 6 Is Pseudo: false Status: on
Is RDM Capable: true Is Removable: false
Is Local: false Is SSD: false
Other Names:
vml.0200010000600c0ff00026e0897718f556010000004d5341203230
VAAI Status: supported
naa.600c0ff00026e0f76d18f55601000000
Device Type: Direct-Access
Size: 3999708 MB
Display Name: HP Fibre Channel Disk (naa.600c0ff00026e0f76d18f55601000000)
Multipath Plugin: NMP
Console Device: /vmfs/devices/disks/naa.600c0ff00026e0f76d18f55601000000
Devfs Path: /vmfs/devices/disks/naa.600c0ff00026e0f76d18f55601000000
Vendor: HP Model: MSA 2040 SAN Revis: G210
SCSI Level: 6 Is Pseudo: false Status: degraded
Is RDM Capable: true Is Removable: false
Is Local: false Is SSD: false
Other Names:
vml.0200000000600c0ff00026e0f76d18f556010000004d5341203230
VAAI Status: supported
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host 2
naa.600c0ff00026e0890000000000000000
Device Type: Enclosure Svc Dev
Size: 0 MB
Display Name: HP Fibre Channel Enclosure Svc Dev (naa.600c0ff00026e0890000000000000000)
Multipath Plugin: NMP
Console Device: /vmfs/devices/genscsi/naa.600c0ff00026e0890000000000000000
Devfs Path: /vmfs/devices/genscsi/naa.600c0ff00026e0890000000000000000
Vendor: HP Model: MSA 2040 SAN Revis: G210
SCSI Level: 6 Is Pseudo: false Status: on
Is RDM Capable: true Is Removable: false
Is Local: false Is SSD: false
Other Names:
vml.020d000000600c0ff00026e08900000000000000004d5341203230
VAAI Status: unsupported
naa.600c0ff00026e0897718f55601000000
Device Type: Direct-Access
Size: 3999708 MB
Display Name: HP Fibre Channel Disk (naa.600c0ff00026e0897718f55601000000)
Multipath Plugin: NMP
Console Device: /vmfs/devices/disks/naa.600c0ff00026e0897718f55601000000
Devfs Path: /vmfs/devices/disks/naa.600c0ff00026e0897718f55601000000
Vendor: HP Model: MSA 2040 SAN Revis: G210
SCSI Level: 6 Is Pseudo: false Status: on
Is RDM Capable: true Is Removable: false
Is Local: false Is SSD: false
Other Names:
vml.0200010000600c0ff00026e0897718f556010000004d5341203230
VAAI Status: supported
naa.600c0ff00026e0f76d18f55601000000
Device Type: Direct-Access
Size: 3999708 MB
Display Name: HP Fibre Channel Disk (naa.600c0ff00026e0f76d18f55601000000)
Multipath Plugin: NMP
Console Device: /vmfs/devices/disks/naa.600c0ff00026e0f76d18f55601000000
Devfs Path: /vmfs/devices/disks/naa.600c0ff00026e0f76d18f55601000000
Vendor: HP Model: MSA 2040 SAN Revis: G210
SCSI Level: 6 Is Pseudo: false Status: degraded
Is RDM Capable: true Is Removable: false
Is Local: false Is SSD: false
Other Names:
vml.0200000000600c0ff00026e0f76d18f556010000004d5341203230
VAAI Status: supported
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