take a look at this paper, it talks about pools, best practices ..etc.

Best Practices for Fast, Simple Capacity Allocation with EMC Symmetrix Virtual Provisioning Technical Note

thanks dynamox, the articel was about thin devices,

my question was about regular devices

As dynamox says, the maximum Symmetrix VMAX volume is 240GB.  In order to create a 240GB volume with 3+1 RAID5 you must have 80GB contiguous free space on 4 disks that satisfy the RAID availability requirements (members can't be on the same drive or loop for example).

Then to create a larger than 240GB host volume, you create a meta volume from individual Symmetrix volumes.

i  mean

If my vmax total current size available was 10 TB, i want to create Standar device Raid 5 (3+1) size 4 TB (meta), can i still create the device?

Raid 5 3+1 = 3 device + 1 parity = (3 x 4 TB) + (1 x 4 TB) or thereis technology for make it happen?

maximum device size on Vmax is 240G so if you need to create a 4TB meta device, you could create 17 x 240G devices and then meta them together.

if you have enought free space on these drives, yes you can. You can run the create command in preview mode and it will tell if you if it meets raid requirements.

when I create devices I get this as well (not very ofter), typically it happens when you provision on brand new drives. If you check with “symdisk list –sid -failed” and nothing is listed …nothing to worry about

Yesterday my colleague create 4 TB data devices raid 5 (3+1) , he create 201 x 20,27 GB, when the devices created, i recved alert "Physical disk drive failure"

no problem with current capacity

when create devices devided into 4 time (50 x 20,27 GB, 50 x 20,27 GB, 50 x 20,27GB. 51x 20,27 GB), no problem

why it's happened ?

your calculation may looks like (3*1.3TB+ 1*1.3TB) to get a 4TB R5 device

the best practice of limiting of maximum of 16 members is one  he may need do consider, again it may depends on the particular requirement versus performance