Also you may wish to look at the output of 'iostat -xnce 1' as well.
You can post those to the list if you have a specific problem. You want to be looking for error counts increasing and specifically 'asvc_t' for the service times on the disks. I higher number for asvc_t may help to isolate poorly performing individual disks. Scott Meilicke wrote:
You can try: zpool iostat pool_name -v 1 This will show you IO on each vdev at one second intervals. Perhaps you will see different IO behavior on any suspect drive. -Scott
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