From: Jim Seymour (jseymour@linxnet.com)
Date: Sat Jan 19 2008 - 00:26:21 EST
Hi Sunmanagers,
Environment:
Sun Sparc Solaris 8 Generic_108528-29 on an E250
Infortrend EonStor 1.4TB RAID 5, U320 SCSI host connection
When I go to "newfs" the filesystems, I'm getting
Warning: insufficient space in super block for rotational
layout tables with nsect sblock.fs_nsect and
ntraksblock.fs_ntrak. (File system performance may be
impaired.)
I've searched and searched, and can find nothing more than what
"man mkfs_ufs" offers, by way of explanation:
Occurs typically on very high density disks. On
such disks, the file system structure cannot
encode the proper disk layout information, result-
ing in suboptimal performance.
So the question is: Is this really an issue with a RAID 5 storage
array? A colleague of mine, explaining what the "rotational layout
table" is and how it's used, suggests not. He suggests that, even if
there would be an impact, it would only affect very large files.
(Files that would span more than a cylinder group?) In any event: It
doesn't appear I can do anything about it. (Other than shrinking the
RAID 5 partitions.)
TIA,
Jim
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