Pl oravol01-P03 oravol01-L02 ENABLED ACTIVE 13981056 CONCAT - RW V oravol01-L02 - ENABLED ACTIVE 13981056 SELECT - fsgen Pl oravol01-P02 oravol01-L01 ENABLED ACTIVE 13981056 CONCAT - RW Pl oravol01-P01 oravol01-L01 ENABLED ACTIVE 13981056 CONCAT - RW V oravol01-L01 - ENABLED ACTIVE 13981056 SELECT - fsgen V oravol01 - ENABLED ACTIVE 41943040 SELECT oravol01-03 fsgen SC NAME PLEX CACHE DISKOFFS LENGTH OFF DEVICE MODEĭg oradg default default 46000 1123603158.13.pooh SV NAME PLEX VOLNAME NVOLLAYR LENGTH OFF AM/NM MODE SD NAME PLEX DISK DISKOFFS LENGTH OFF DEVICE MODE PL NAME VOLUME KSTATE STATE LENGTH LAYOUT NCOL/WID MODE V NAME RVG/VSET/CO KSTATE STATE LENGTH READPOL PREFPLEX UTYPE RL NAME RVG KSTATE STATE REM_HOST REM_DG REM_RLNK RV NAME RLINK_CNT KSTATE STATE PRIMARY DATAVOLS SRL ST NAME STATE DM_CNT SPARE_CNT APPVOL_CNT $ vxprint -ht DG NAME NCONFIG NLOG MINORS GROUP-ID The following example uses the vxprint(1m) “-h” (list record hierarchies) and “-t” (use one-line format tailored for each record type) options to display the configuration database with an informational header and descriptive records: To print the contents of the configuration database, the vxprint(1m) utility can be used. $ vxdg list oradg | egrep "config disk.*clean online" config disk c1t1d0s2 copy 1 len=1280 state=clean onlineĬonfig disk c1t2d0s2 copy 1 len=1280 state=clean onlineĬonfig disk c1t3d0s2 copy 1 len=1280 state=clean onlineĬonfig disk c1t4d0s2 copy 1 len=1280 state=clean onlineĬonfig disk c1t5d0s2 copy 1 len=1280 state=clean online To list the devices in a disk group with a copy of the configuration database, the vxdg(1m) utility can be invoked with the “list” option and a disk group to query: The configuration database is stored in the private region of several devices in each disk group for redundancy. When new objects (e.g., subdisks, plexes, volumes) are created with the Veritas CLI or GUI, Veritas will write the configuration data to describe these objects to a configuration database. As I will discuss in the section Configuration Backups, Veritas introduced new features in Veritas Volume Manager 4.X to ease the backup process. Lockrgn priv 001536-001679: part=00 offset=000000ĭue to the critical nature of the configuration information stored in the disk headers, it is important to periodically back up this information. Pubpaths: block=/dev/vx/dmp/c1t1d0s2 char=/dev/vx/rdmp/c1t1d0s2 Info: format=cdsdisk,privoffset=256,pubslice=2,privslice=2įlags: online ready private autoconfig autoimport imported The disk header can be printed by passing the Veritas device name to vxdisk(1m)‘s “list” option: The disk header contains a diskid to uniquely identify the device, a disk group identifier to indicate which disk group the device is associated with, a set of flags to indicate the status and intended use (e.g., hot spare) of the device, and a hostid to indicate which host (if any) has the device imported. When a device is initialized or encapsulated with Veritas Volume Manager, a disk header is written to the device’s private region. If you are new to Veritas Volume Manager, consult the vxintro(1m) man page for an introduction to terminology and basic usage. A basic knowledge of Veritas Volume Manager will be assumed. The article will also provide two disaster-recovery case studies to show how these recovery features can be used to aide in recovering from disasters when they strike. This article will provide an introduction to two important and often overlooked recovery features: failure notifications and configuration database backups. The recoverability features help to ensure that data is protected when hardware platforms fail and to ease the process required to restore systems to an operational state. Veritas Volume Manager (VxVM) has become the standard Logical Volume Manager (LVM) in many enterprises for its robust feature set, its ability to run on multiple operating systems (e.g., HP-UX, Linux, Solaris, Windows), and the numerous scalability, availability, and recoverability features that come with the base product.
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