You can also speed up the startup of Spectrum Scale (GPFS) by using the nsddevices exit to supplement or bypass the normal "scan all block devices" process by Spectrum Scale. Useful if you have lots of LUNs or other block devices which are not NSDs, or for multipath. Though later versions of Scale might have fixed the scan for multipath devices. Anyway, this is old but potentially useful https://mytravelingfamily.com/2009/03/03/making-gpfs-work-using-multipath-on-linux/
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