Sun StorEdge[TM] 3x10 Array: newfs fails with Error on "minimum cylinders per group"

Asset ID:	1-72-1006040.1
Update Date:	2013-06-19
Keywords:

Solution Type Problem Resolution Sure

Solution 1006040.1 : Sun StorEdge[TM] 3x10 Array: newfs fails with Error on "minimum cylinders per group"

Applies to:

Sun Storage 3510 FC Array - Version Not Applicable and later
Sun Storage 3511 SATA Array - Version Not Applicable and later
All Platforms

Symptoms

The following message is reported when trying to execute a newfs command on a logical drive or logical volume, that’s presented to the host (typically larger than 2GB).

# newfs -v -m 1 /dev/rdsk/c2t600C0FF000000000002ED234d0s0
newfs: construct a new file system
dev/rdsk/c2t600C0FF000000000002ED234AFFE4300d0s0 y
mkfs -F ufs /dev/rdsk/c2t600C0FF000000000002ED234AFFE4300d0s0 1144777365 127 255 81951 1 90 8192 t 0 -1 8 127
Minimum bytes per inode is 11992
With 32385 sectors per cylinder, minimum cylinders per group is 16. This requires the fragment size to be changed from 1024 to 8192. Please re-run mkfs with corrected parameters.

Cause

The cause of these messages, is an incorrect value in the host cylinder/head/sector mapping configuration on the Sun StorEdge 3310, 3510 or 3511 array.

Solution

After connecting by serial cable or telnet,

Select "View and Edit Configuration Parameters"
Select "Host side SCSI Parameters"
Select "Host Cylinder/Head/Sector Mapping Configuration

A. Modify the Sector Ranges to: Variable

B. Modify the Head Ranges to: 64 Heads

C. Modify the Cylinder Ranges to: < 65536

Also, re-label the drive from Solaris[TM] OS, with the format command.

To re-label the drive, do the following steps:

Use format -e (expert mode)
Select the LUN you will newfs
Select the 'type' option in format
Choose option '0. Auto-Configure'
Say "no" to the question 'use format.dat '
Say "yes" to the question 'use SCSI-2 inquiry '
Label the LUN with this new information

Once this is changed, the newfs will complete successfully.

A reboot is not necessary for the change to be recognized.

The array dynamically changes the host side parameters.

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