Seagate ST318404LC Podręcznik Użytkownika Pobierz pdf (Strona 36)

Dell Compellent Confidential HP-UX Best Practices 11i v2 and 11i v1

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/dev/vg00/lvol6 4194304 20928 4140776 1% /tmp

/dev/vg00/lvol5 10485760 5247280 5197656 50% /opt

/dev/vg00/lvol4 524288 20800 499560 4% /home

rx1620.techsol.beer.town:/Tools

51380224 11460912 37424433 23% /Tools

/dev/vgdemo/lvol1 51249152 79205 47971833 0% /vgdemo/lvol1

/dev/vgdemo_import/lvol1

51249152 79205 47971833 0% /vgdemo_import/lvol1

There are some very important caveats to note. HP-UX 11i v2 and older use LVM 1.0

structures while HP-UX 11i v3 uses LVM 1.0, 2.0 and/or 2.1 structures. LVM structures are

NOT backward compatible! You could technically create a Volume Group and Logical Volume on HP-UX

11i v3 and access it with HP-UX 11i v1; however, VxFS versions are also NOT backward compatible.

Therefore, even if you create an LVM 1.0 Volume Group with HP-UX 11i v3, the file system that you

place on any Logical Volumes with HP-UX 11i v3 will not be readable by any previous version of HP-UX.

For all practical purposes, replay/s are OS forward compatible but not OS backward compatible!

This is a limitation of the HP-UX, LVM structures and VxFS and not of Dell Compellent Storage

Center replay functionality.

Working with Striped/Mirror or MultiVolume Volume Groups

Most of the procedures here are identical to the section Mounting to the same host or Mounting to a

alternate host above; with the exception of the following. For this example, we will be using a 5-way

striped Volume Group; mirrored or concatenated Volume Groups would be managed in a similar

manner.

To ensure the data integrity of these MultiVolume Volume Groups, we would use a feature of the Dell

Compellent Storage Center known as a Consistency Group. A Consistency Group allows the user to

capture a Replay of multiple volumes on the Dell Compellent Storage Array at the same and immediate

point in time. Achieving this function would involve the use of Replay Profiles.

The first step is to create a Consistent Replay profile as seen below. The Replay Profiles sub-item is

located within the Storage tree of the Dell Compellent Storage Center GUI. Right-Clicking on the

Replay Profiles item displays this dialog shown below, where you would then select the “Create

Consistent Replay Profile” option.

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Seagate ST318404LC Podręcznik Użytkownika Strona 36