Hi all,
Thanks for your responses to my earlier question about swapping small disks for larger ones. Looks like we're going to have to get the mice in the comms room to pedal faster...
Anyway, another query entirely. I've just found that one of my netapps is really poorly wired - it's a 3040C with two SATA shelves on one loop, and most of the wiring has IN and OUT ports swapped from the way it should be, aside from one example where it's the right way around. The netapp head can see the shelves though, so it's clearly not too much of a problem.
I now want to add two more shelves to the loop. Is it worth recabling the whole thing so it's done correctly, bearing in mind that vol0 lives on the affected SATA shelves and there is production stuff on the other loop (FCAL shelves), I'm guessing the filer won't like it if vol0 goes away? Someone here suggested that the incorrect wiring may be affecting performance. Or does it make no difference and I can just add the new shelves with the wiring inthe same backwards manner?
Peta
Hey Peta,
On Thu, Dec 4, 2008 at 1:50 PM, Peta Spies peta.spies@gmail.com wrote:
I now want to add two more shelves to the loop. Is it worth recabling the whole thing so it's done correctly, bearing in mind that vol0 lives on the affected SATA shelves and there is production stuff on the other loop (FCAL shelves), I'm guessing the filer won't like it if vol0 goes away? Someone here suggested that the incorrect wiring may be affecting performance. Or does it make no difference and I can just add the new shelves with the wiring inthe same backwards manner?
I don't have any experience on the incorrect wiring, I tend to wire NetApp's correctly :-)
When you should decide to recable, bear in mind that:
1) Any loss of connectivity with 2 or more disks without the possibility to use spares to rebuild, will result in a Multiple Disks Missing PANIC. 2) You will most likely have to reboot when you are done for the filer to map ESH, shelf and disks correctly, so why not power down, recable and power up again?
Greets,
Nils
Hello,
Can anyone tell me how I can remove myself from the toasters mailing list?
Thanks, Dennis
-----Original Message----- From: Peta Spies [mailto:peta.spies@gmail.com] Sent: Thursday, December 04, 2008 7:51 AM To: toasters@mathworks.com Subject: Wiring question
Hi all,
Thanks for your responses to my earlier question about swapping small disks for larger ones. Looks like we're going to have to get the mice in the comms room to pedal faster...
Anyway, another query entirely. I've just found that one of my netapps is really poorly wired - it's a 3040C with two SATA shelves on one loop, and most of the wiring has IN and OUT ports swapped from the way it should be, aside from one example where it's the right way around. The netapp head can see the shelves though, so it's clearly not too much of a problem.
I now want to add two more shelves to the loop. Is it worth recabling the whole thing so it's done correctly, bearing in mind that vol0 lives on the affected SATA shelves and there is production stuff on the other loop (FCAL shelves), I'm guessing the filer won't like it if vol0 goes away? Someone here suggested that the incorrect wiring may be affecting performance. Or does it make no difference and I can just add the new shelves with the wiring inthe same backwards manner?
Peta
-
Go, Dennis -
Nils Vogels -
Peta Spies