Originally posted by: Evadman
Originally posted by: orenero
Originally posted by: Evadman
I wish I understood everything about how the EMC fibrechannel cards work. One of the servers I admin is connected to 20 disks though a SAN fabric though 2 EMC fibrechannel cards, and I only know enough to be dangerous.
Those cards are called HBA's host bust adapters.. They are connect directly to the FA of the clarion or symettrix storage array or to the switch, typicall mcdata or cisco, brocade. It's really not that complicated. Everything in san needs to be zoned, meaning you say this host using this hba card can see this storage on this clarion server etc... That is just the basic description its lot more than that. Its really important to know the arhictechure of storage array you are working with. Like Clarions have two service processors which control access to the storage, spa, spb ( service processor a and B ) etc etc...
About 90% of what you just said went right over my head. Do you know of a good place to read up on the basics of how/what a FA ,mcdata, brocade, zones, clarion servers and such are? I understand that it is a HBA; that was pretty mcuh all I understood
😛. My SAN fabric knowledge is extreamly limited. Thankfully, I do not need to know it for what I do, but I would like to know so Ic an have intelligent conversations.
For example, one of the SQL servers I admin appears to have a disk bottle neck (the disk is an array conencted though this fabric) where my disk queue goes over 600, when anything > 2 per spindle is considered bad. Unfortunately, I have no idea how many spindles are on the other side of the conenction from me. All I see on my side is 20 disks 18 GB each. I have no idea if they are RAID 1, 5, 10, etc. so I can't do some math.
Anyway, I don't want to turn this into a trouble shooting thread (too on topic for off topic
🙂) but I would love any good links, or a book recomendation.