Possible slow I/O throughput on newly created unit.

[Steve Burt_1]

Hi All a few days ago, I created a new striped unit and 1 jbod, I then used addvol to create 1 advfs file domain. (Not my preferred method, but then I am not paying the bill ;-)..

Feeling rather pleased with myself I think job done.... but no The Backup engineer informs me that his backups to that file domain which is underpinned by my unit is taking double the time :-(

Not saving any kind paper output has not helped, but is there anything that I would need to set that might, as I am still not sure if it is anything I have done, but might speed us the time taken to preform a backup..

I enclose my units
D15 DBBACKUP
LUN ID: 6000-1FE1-001C-1AF0-0009-8090-0678-002A
NOIDENTIFIER
Switches:
RUN NOWRITE_PROTECT READ_CACHE
READAHEAD_CACHE WRITEBACK_CACHE
MAX_READ_CACHED_TRANSFER_SIZE = 32
MAX_WRITE_CACHED_TRANSFER_SIZE = 32
Access:
ALL
State:
ONLINE to this controller
Persistent reserved
NOPREFERRED_PATH
Host Based Logging NOT Specified
Size: 711146265 blocks
Geometry (C/H/S): ( 1394405 / 2 / 255 )



D14 DISK30000
LUN ID: 6000-1FE1-001C-1AF0-0009-8090-0678-001F
NOIDENTIFIER
Switches:
RUN NOWRITE_PROTECT READ_CACHE
READAHEAD_CACHE WRITEBACK_CACHE
MAX_READ_CACHED_TRANSFER_SIZE = 32
MAX_WRITE_CACHED_TRANSFER_SIZE = 32
Access:
ALL
State:
ONLINE to this controller
Persistent reserved
NOPREFERRED_PATH
Host Based Logging NOT Specified
Size: 35556389 blocks
Geometry (C/H/S): ( 7000 / 20 / 254 )

[Mark Poeschl_2]

Double the time as compared to what?

You'll need to post the output of
SHOW DISK FULL
SHOW UNITS FULL
SHOW STRIPE
SHOW RAID
SHOW MIRROR
from your HSG80-based storage array as well as info on how your AdvFS domains are configured to get any meaningful answers. Is LSM involved?