Type of Logical Volume lost after vgexport/gvimport process Post: 302257644

Sponsored Content

Operating Systems AIX Type of Logical Volume lost after vgexport/gvimport process Post 302257644 by shockneck on Wednesday 12th of November 2008 06:28:59 PM

11-12-2008

Registered User

IMHO an LV Type of "jfs" is misleading if one wants to create raw devices and should be avoided therefore. Preferably one uses another name for Type, e.g. "raw", so that it is easily visible in the LV's properties what this LV is.

What probably happened is: sbdy created that LV and either assigned the Type or left the Type field empty in which case the default type (i.e. jfs) was chosen. The Informix DB did something to the LV (perhaps the DB did not use a leading offset but wrote over the LV's first 512 byte destroying the Logical Volume Control Block LVCB that way). When exporting the VG you deleted every information of that VG from the server's ODM. As there was nothing to read from the LV during import the Type field now is empty.

That LV handling might have caused a drawback. If you just lost the information about that type you may be lucky. Older versions of AIX had problems when importing/changing LVs who's LVCB was destroyed. I don't know if/how that changed with AIX 5L onwards but you might not be able to import/change the LV's correctly. So check thoroughly that your DB can use the raw devices as it should.

shockneck

View Public Profile for shockneck

Find all posts by shockneck

9 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

LVM - Extending Logical Volume within Volume Group

Hello, I have logical volume group of 50GB, in which I have 2 logical volumes, LogVol01 and LogVol02, both are of 10GB. If I extend LogVol01 further by 10GB, then it keeps the extended copy after logical volume 2. I want to know where it keeps this information Regards Himanshu

2. AIX

Moving a Logical Volume from one Volume Group to Another

Does anyone have any simple methods for moving a current logical volume from one volume group to another? I do not wish to move the data from one physical volume to another. Basically, I want to "relink" the logical volume to exist in a different volume group. Any ideas?

3. AIX

Basic Filesystem / Physical Volume / Logical Volume Check

Hi! Can anyone help me on how I can do a basic check on the Unix filesystems / physical volumes and logical volumes? What items should I check, like where do I look at in smit? Or are there commands that I should execute? I need to do this as I was informed by IBM that there seems to be...

4. AIX

Logical volume name conflict in two volume group

Hello, I am a french computer technician, and i speak English just a little. On Aix 5.3, I encounter a name conflict logical volume on two volume group. The first volume lvnode01 is OK in rootvg and mounted. It is also consistent in the ODM root # lsvg -l rootvg |grep lvnode01 ...

5. HP-UX

Logical volume sharing

Dear all, I have a server where all the space in the volume group got filled. I have another server where I have got some space. Can I use the logical volume of server B to a directory under server A. Pl let me know if there are steps to do this. Rgds Rj

6. UNIX for Dummies Questions & Answers

Confusion Regarding Physical Volume,Volume Group,Logical Volume,Physical partition

Hi, I am new to unix. I am working on Red Hat Linux and side by side on AIX also. After reading the concepts of Storage, I am now really confused regarding the terminologies 1)Physical Volume 2)Volume Group 3)Logical Volume 4)Physical Partition Please help me to understand these concepts.

7. AIX

Position of the logical volume on the physical volume

Hello everyone, I just read that while creating a logical volume(LV) we can choose the region of the physical volume (PV) in which the LV should be created. When I say region I mean: outer edge - outer middle - center - inner middle and inner edge. Can anyone help me understand the utility...

8. UNIX for Dummies Questions & Answers

How to create a volume group, logical volume group and file system?

hi, I want to create a volume group of 200 GB and then create different file systems on that. please help me out. Its becomes confusing when the PP calculating PP. I don't understand this concept.

9. Red Hat

No space in volume group. How to create a file system using existing logical volume

Hello Guys, I want to create a file system dedicated for an application installation. But there is no space in volume group to create a new logical volume. There is enough space in other logical volume which is being mounted on /var. I know we can use that logical volume and create a virtual...

LEARN ABOUT DEBIAN

t1disasm

T1DISASM(1)						      General Commands Manual						       T1DISASM(1)

NAME

       t1disasm - disassemble PostScript Type 1 font

SYNOPSIS

       t1disasm [input [output]]

DESCRIPTION

       t1disasm  disassembles Adobe Type 1 font programs in either PFA (hexadecimal) or PFB (binary) formats into human-readable form. If the file
       output is not specified output goes to the standard output.  If the file input is not specified input comes from the standard input.

       t1disasm performs eexec and charstring decryption as specified in the  ``black  book'',	Adobe  Type  1	Font  Format.	Additionally,  the
       charstring binary tokens are expanded into human-readable text form, using the names given in the black book and later documents describing
       Type 2 opcodes.

EXAMPLES

       % t1disasm Utopia-Regular.pfb Utopia-Regular.raw
       % t1disasm Utopia-Regular.pfa Utopia-Regular.raw

       In Subrs entries in Utopia-Regular.raw will look like
	      dup 5 {
		      8 111 vstem
		      -12 128 hstem
		      707 -20 hstem
		      return
		      } |
       and the CharStrings entries like
	      /exclam {
		      58 242 hsbw
		      6 callsubr
		      5 4 callsubr
		      63 707 rmoveto
		      -54 0 -5 -22 4 -45 rrcurveto
		      40 -431 rlineto
		      29 hlineto
		      42 431 rlineto
		      4 45 -5 22 -55 0 rrcurveto
		      closepath
		      6 4 callsubr
		      -719 vmoveto
		      243 callsubr
		      endchar
		      } |-

SEE ALSO

       t1asm(1), t1ascii(1), t1binary(1), t1unmac(1), t1mac(1)

       Adobe Type 1 Font Format is available free from Adobe as a PDF file: http://partners.adobe.com/asn/developer/PDFS/TN/T1_SPEC.PDF

       The Type 2 Charstring Format, also available from Adobe as a PDF file, describes the newer Type 2 operators, which are also  used  in  some
       multiple-master Type 1 fonts like Adobe Jenson and Kepler: http://partners.adobe.com/asn/developer/PDFS/TN/5177.Type2.pdf

AUTHORS

       Lee Hetherington (ilh@lcs.mit.edu)
       Eddie Kohler (ekohler@gmail.com)

Version 1.37															       T1DISASM(1)