In some of my previous post I have outlined the reasons and consequences of errors on a link. There are multiple locations where a bit may flip from a 0 to a 1 or reverse. CRC errors, encoding errors, synchronisation and link failures are the usual symptoms and may lead to corrupted frames, primitives signals […]
Errors and other nastiness on a serial transmission link Read More »
Credit – who doesn\’t want to have lots of it at the bank According to Wikipedia the short definition in finance terms is : Credit is the trust which allows one party to provide resources to another party where that second party does not reimburse the first party immediately (thereby generating a debt, but instead arranges
One rotten apple spoils the bunch – 4 Read More »
In the previous 2 blog-posts we looked at some areas why a fibre-channel fabric still might have problems even with all redundancy options available and MPIO checking for link failures etc etc. The challenge is to identify any problematic port and act upon indications that certain problems might be apparent on a link. So how
One rotten apple spoils the bunch – 3 Read More »
Last week I had another one. A rotten apple that spoiled the bunch or, in storage terms, a slow drain device causing havoc in a fabric. This time it was a blade-center server with a dubious HBA connection to the blade-center switch which caused link errors and thus corrupt frames, encoding errors and credit depletion.
One rotten apple spoils the bunch – 1 Read More »
