[SunHELP] disksuite limitations ?

[Magnus Abrante]

On Tue, Nov 21, 2000 at 03:12:49PM +0000, Tom Stockton wrote:
> Hi
> 
> I am configuring an E450 fully loaded with 20 18GB disks. The requirement is 
> for 7 partitions per disk to be mirrored using disk suite. This would total 140 
> components. All has been going fine until I have tried to add the 128th device, 
> I receive the message 
> concat/stripe commit error, looking up device d128, no such file or directory' 

The limit in DiskSuite is 128 MetaDevices / Diskset, with a total maximum
of 1024 metadevices. 

So what you need to do here is to create some disksets (man metaset)

These devices will be places as /dev/md/<name of diskset>/dsk/<metadevice>
instead of /dev/md/dsk>/<metadevice>. There is actually some other 
advantadges of using disksets, like if you are using HotSpares (metahs) or 
so.
 
> I am using 4 meta DBs and wondered if there was maybe a maximum ratio of 
> compnents to DBs.  I added 2 more but still the same message occurs.  Does 
> anyone have any thoughts on this? Have I reached the limits of disk suite? Any 
> comments much appreciated.

Most likely not, if the partitions where you have the DB's on is to small
having *many* metadevices might eventually fill this partition, othervise
i dont think there is a limitation. 

	//Magnus Abrante
/* This is my opinion and not the one of my empolyer */