in symmetrix when we map meta device to the lun address does the meta member also get any avilable address by default?

yes, meta head and meta members take up available slots on the FA

Hi,

Yes even meta members will take the available address and will count towards the total number of devices you can map to FA.

Thanks

Amita

The meta head is what takes the channel address and is visible to the host.  The meta members themselves do not get a host channel address but they do count towards the addressable limit on the FA.  In a manner they lower the number of addressable volumes on an FA.

Below are addressed devices on an FA, C19 and F33 are both 4 member meta volumes while the others are standard luns.  The addresses are contiguous and the meta members have no channel address but they do count to the limit of addressable devices.

044B  Not Visible                     0   00  027

07C5  Not Visible                     0   00  028

0C19  Not Visible             (M)     0   00  029

0F33  Not Visible             (M)     0   00  02A

13CF  Not Visible                     0   00  02B

0450  Not Visible                     0   00  02C

thanks guys...that was helpful

The maximum number of devices (Symm Vols) that SymmWin will allow to be configured on an FA or SA processor is 904 for 5266 and 5267 .

The maximum number of devices (Symm Vols) that SymmWin will allow to be configured on an FA or SA processor is 2048 for 5566, 5567, 5568, 5669, 5670 and 5671.

The maximum number of devices (Symm Vols) that SymmWin will allow to be configured on an FA processor is 4096 for 5771, 5772, 5773, 5874 and 5875.

Note also that the restriction is per processor (NOT per port). If one SA or FA or SE processor services more than one port, logical volumes assigned to both ports count towards this total. However, again we are counting logical volumes and NOT LUN addresses. If the same logical volume (Symm Vol) is assigned (addressed) to two ports on the same SA or FA processor it only counts once towards the above totals. So for example if you assign (address) Symm devices 40-103F (4096 decimal devices) to SAF-7a port 0 and assign the same Symm devices 40-103F to SAF-7a port 1 it will only count once towards the maximum of 4096 (decimal) assigned devices.

Note that Meta Volume members ALWAYS count towards this SymmWin / Enginuity limit:

There is a 255 member limit on the number of members that a single meta volume may contain (currently true at ALL Enginuity up to and including 5773). There is also a HOST/OS limit to the maximum size of a single meta volume (i.e. number of meta members multiplied by the individual meta member size) that a host can address as one LUN. Even if the volumes are configured as Meta's with only the Meta heads assigned, SymmWin still takes into account the number of meta members when calculating the total number of Symmetrix logical volumes assigned to the FA.