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| new disks added to 7400 https://www.3parug.com/viewtopic.php?f=18&t=1117 |
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| Author: | mohuddle [ Mon Jan 19, 2015 10:32 am ] |
| Post subject: | new disks added to 7400 |
48 SFF disks added to existing 8-shelves...admithw completed...is that it? Should we expect to see some sort of rebalance occur where now I have 54% of existing disks used, only 4% of new disks used which are free spare chunklets I believe, but that's it. |
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| Author: | mohuddle [ Mon Jan 19, 2015 10:42 am ] |
| Post subject: | Re: new disks added to 7400 |
mohuddle wrote: 48 SFF disks added to existing 8-shelves...admithw completed...is that it? Should we expect to see some sort of rebalance occur where now I have 54% of existing disks used, only 4% of new disks used which are free spare chunklets I believe, but that's it. I will add that the day following the disk install, I ran a tunesys and didn't notice anything was done. That was about 5-days ago. Running again this morning, however, looks like it's actually trying to do some work. |
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| Author: | JohnMH [ Mon Jan 19, 2015 11:30 am ] |
| Post subject: | Re: new disks added to 7400 |
Each chunklet need to be cleaned / zero'ed out before they are available for use by the system, so that may explain why tunesys didn't actually do anything initially. |
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| Author: | mohuddle [ Mon Jan 19, 2015 12:05 pm ] |
| Post subject: | Re: new disks added to 7400 |
JohnMH wrote: Each chunklet need to be cleaned / zero'ed out before they are available for use by the system, so that may explain why tunesys didn't actually do anything initially. Thanks JohnMH. |
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| Author: | Davidkn [ Mon Jan 19, 2015 6:24 pm ] |
| Post subject: | Re: new disks added to 7400 |
Be interested to know how long this tunesys takes please. |
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| Author: | Josh26 [ Mon Jan 19, 2015 6:41 pm ] |
| Post subject: | Re: new disks added to 7400 |
JohnMH wrote: Each chunklet need to be cleaned / zero'ed out before they are available for use by the system, so that may explain why tunesys didn't actually do anything initially. Is there a way to watch the progress of that and identify when it's actually worth running that tunesys? |
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| Author: | Architect [ Tue Jan 20, 2015 2:24 am ] |
| Post subject: | Re: new disks added to 7400 |
Showpd -c -p -devtype FC This shows the amount of chunks per drive, intialized, unitialized, free, used, etc. You could plot the table e.g. In excel. that way you have a visual overview of the balance. |
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| Author: | RitonLaBevue [ Tue Jan 20, 2015 2:26 am ] |
| Post subject: | Re: new disks added to 7400 |
Rather than tunesys which must be run a lot of times before having nice results, we use tunevv. |
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| Author: | JohnMH [ Tue Jan 20, 2015 5:01 am ] |
| Post subject: | Re: new disks added to 7400 |
You can also use showpdch -cng to monitor chunklet cleaning or showsys -space and look at the uninitialized number. |
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| Author: | Architect [ Tue Jan 20, 2015 5:35 am ] |
| Post subject: | Re: new disks added to 7400 |
RitonLaBevue wrote: Rather than tunesys which must be run a lot of times before having nice results, we use tunevv. from what i've seen, that issue is finally fixed in 3.2.1 tunesys had some issues tuning R6 before that release. |
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