Mounting the PowerPath devices with "_netdev" option permits boot-time fsck on PowerPath pseudo-devices (and also on Logical Volumes created out of PowerPath pseudo-devices). The fsck is performed by S25netfs after network services are up (PowerPath is already started by then).
The fsckorder (6th column on /etc/fstab) may be marked as necessary (a value greater than 0 performs boot-time fsck).
is _netdev requirement something new that has to be done with PP5, we have never used _netdev with PP4.5 ..but i wonder if this is something we have to pay attention to when we upgrade to PP5.
The PP5.1 release notes are now available on PowerLink: from p30: === The _netdev option in /etc/fstab PowerPath devices should be mounted with "_netdev" option in /etc/fstab to permit boot-time fsck. For RHEL 5 and 5.1, in an iSCSI setup, PowerIscsi is run as service S24. This configures the PowerPath devices and makes them available to S25netfs to perform fsck on them. ===
the Release notes are non-specific regarding RHEL version, I have checked the OPT that this bug was reported to EMC and it was on the RHEL5 platform... I will do more reseach into previous cases and see if RHEL4 is affected the same way... Will update you shortly.
jem3
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January 10th, 2008 10:00
rawstorage
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January 30th, 2008 05:00
The fsckorder (6th column on /etc/fstab) may be marked as necessary (a value greater than 0 performs boot-time fsck).
Sample /etc/fstab file:
-----------------------
/dev/VolGroup00/LogVol01 / ext3 defaults 1 1
/dev/emcpowerl /mnt/mnta ext2 _netdev 0 2
/dev/emcpowerd /mnt/mntb ext3 _netdev 0 0
/dev/vg_emcp_xov/lvol0 /mnt/mnto ext2 _netdev 0 3
/dev/vg_emcp_xov/lvol0 is a LV created out of PowerPath pseudo-devices.
It needs to be documented that PowerPath devices should be mounted with "_netdev" option in /etc/fstab to permit boot-time fsck.
The documentation will be updated to reflect this.
dynamox
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January 30th, 2008 06:00
is _netdev requirement something new that has to be done with PP5, we have never used _netdev with PP4.5 ..but i wonder if this is something we have to pay attention to when we upgrade to PP5.
Thanks
rawstorage
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January 30th, 2008 07:00
rawstorage
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January 30th, 2008 07:00
These are not available on powerlink as yet..
Message was edited by:
PaulCork
dynamox
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January 30th, 2008 08:00
Conor
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February 4th, 2008 04:00
===
The _netdev option in /etc/fstab
PowerPath devices should be mounted with "_netdev" option in
/etc/fstab to permit boot-time fsck. For RHEL 5 and 5.1, in an iSCSI
setup, PowerIscsi is run as service S24. This configures the PowerPath
devices and makes them available to S25netfs to perform fsck on
them.
===
dynamox
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February 4th, 2008 10:00
does it also apply to RHEL 4 with Powerpath 5.1 ?
Thanks
Conor
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February 4th, 2008 23:00
the Release notes are non-specific regarding RHEL version, I have checked the OPT that this bug was reported to EMC and it was on the RHEL5 platform... I will do more reseach into previous cases and see if RHEL4 is affected the same way... Will update you shortly.
dynamox
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February 5th, 2008 11:00
Conor
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February 6th, 2008 01:00
dynamox
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February 6th, 2008 06:00