Need to format the old ASM disks on solaris.10.
Hello Gurus,
we uninstalled the ASM on solaris, but while installing the ASM again it says that mount point already used by another instance, but there is no db and ASM running (this is the new server) so we need to use dd command or need to reformat the raw devices which already exists and used by the old ASM instance,here is the confusion...
there are 6 Luns presented to the this host for ASM,its not used by anyone...
# format
Searching for disks...done
AVAILABLE DISK SELECTIONS:
0. c0t0d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848> solaris
/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@0,0
1. c0t1d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848> solaris
/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@1,0
2. c2t60050768018E82BE98000000000007B2d0 <IBM-2145-0000-150.00GB>
/scsi_vhci/ssd@g60050768018e82be98000000000007b2
3. c2t60050768018E82BE98000000000007B3d0 <IBM-2145-0000 cyl 44798 alt 2 hd 64 sec 256>
/scsi_vhci/ssd@g60050768018e82be98000000000007b3
4. c2t60050768018E82BE98000000000007B4d0 <IBM-2145-0000 cyl 19198 alt 2 hd 64 sec 256>
/scsi_vhci/ssd@g60050768018e82be98000000000007b4
5. c2t60050768018E82BE98000000000007B5d0 <IBM-2145-0000 cyl 5118 alt 2 hd 32 sec 64>
/scsi_vhci/ssd@g60050768018e82be98000000000007b5
6. c2t60050768018E82BE98000000000007B6d0 <IBM-2145-0000 cyl 5118 alt 2 hd 32 sec 64>
/scsi_vhci/ssd@g60050768018e82be98000000000007b6
7. c2t60050768018E82BE98000000000007B7d0 <IBM-2145-0000 cyl 5118 alt 2 hd 32 sec 64>
/scsi_vhci/ssd@g60050768018e82be98000000000007b7
but the thing is when we try to list the raw devices by ls -ltr on /etc/rdsk location all disk owned by root and other not in oracle:dba & oinstall.
root@b2dslbmom3dbb3301 [dev/rdsk]
# ls -ltr
total 144
lrwxrwxrwx 1 root root 64 Jun 10 13:24 c0t0d0s0 -> ../../devices/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@0,0:a,raw
lrwxrwxrwx 1 root root 64 Jun 10 13:24 c0t0d0s1 -> ../../devices/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@0,0:b,raw
lrwxrwxrwx 1 root root 64 Jun 10 13:24 c0t0d0s2 -> ../../devices/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@0,0:c,raw
lrwxrwxrwx 1 root root 64 Jun 10 13:24 c0t0d0s3 -> ../../devices/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@0,0:d,raw
lrwxrwxrwx 1 root root 64 Jun 10 13:24 c0t0d0s4 -> ../../devices/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@0,0:e,raw
lrwxrwxrwx 1 root root 64 Jun 10 13:24 c0t0d0s5 -> ../../devices/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@0,0:f,raw
lrwxrwxrwx 1 root root 64 Jun 10 13:24 c0t0d0s6 -> ../../devices/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@0,0:g,raw
lrwxrwxrwx 1 root root 64 Jun 10 13:24 c0t0d0s7 -> ../../devices/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@0,0:h,raw
lrwxrwxrwx 1 root root 64 Jun 10 13:24 c0t1d0s0 -> ../../devices/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@1,0:a,raw
lrwxrwxrwx 1 root root 64 Jun 10 13:24 c0t1d0s1 -> ../../devices/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@1,0:b,raw
lrwxrwxrwx 1 root root 64 Jun 10 13:24 c0t1d0s2 -> ../../devices/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@1,0:c,raw
lrwxrwxrwx 1 root root 64 Jun 10 13:24 c0t1d0s3 -> ../../devices/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@1,0:d,raw
lrwxrwxrwx 1 root root 64 Jun 10 13:24 c0t1d0s4 -> ../../devices/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@1,0:e,raw
lrwxrwxrwx 1 root root 64 Jun 10 13:24 c0t1d0s5 -> ../../devices/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@1,0:f,raw
lrwxrwxrwx 1 root root 64 Jun 10 13:24 c0t1d0s6 -> ../../devices/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@1,0:g,raw
lrwxrwxrwx 1 root root 64 Jun 10 13:24 c0t1d0s7 -> ../../devices/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@1,0:h,raw
lrwxrwxrwx 1 root root 64 Jun 10 13:24 c0t3d0s0 -> ../../devices/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@3,0:a,raw
lrwxrwxrwx 1 root root 64 Jun 10 13:24 c0t3d0s1 -> ../../devices/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@3,0:b,raw
lrwxrwxrwx 1 root root 64 Jun 10 13:24 c0t3d0s2 -> ../../devices/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@3,0:c,raw
lrwxrwxrwx 1 root root 64 Jun 10 13:24 c0t3d0s3 -> ../../devices/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@3,0:d,raw
lrwxrwxrwx 1 root root 64 Jun 10 13:24 c0t3d0s4 -> ../../devices/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@3,0:e,raw
lrwxrwxrwx 1 root root 64 Jun 10 13:24 c0t3d0s5 -> ../../devices/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@3,0:f,raw
lrwxrwxrwx 1 root root 64 Jun 10 13:24 c0t3d0s6 -> ../../devices/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@3,0:g,raw
lrwxrwxrwx 1 root root 64 Jun 10 13:24 c0t3d0s7 -> ../../devices/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@3,0:h,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B7d0s0 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b7:a,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B7d0s1 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b7:b,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B7d0s2 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b7:c,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B7d0s3 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b7:d,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B7d0s4 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b7:e,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B7d0s5 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b7:f,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B7d0s6 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b7:g,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B6d0s0 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b6:a,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B6d0s1 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b6:b,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B6d0s2 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b6:c,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B6d0s3 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b6:d,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B6d0s4 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b6:e,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B6d0s5 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b6:f,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B6d0s6 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b6:g,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B5d0s0 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b5:a,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B5d0s1 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b5:b,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B5d0s2 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b5:c,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B5d0s3 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b5:d,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B5d0s4 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b5:e,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B5d0s5 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b5:f,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B5d0s6 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b5:g,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B4d0s0 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b4:a,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B4d0s1 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b4:b,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B4d0s2 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b4:c,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B4d0s3 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b4:d,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B4d0s4 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b4:e,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B4d0s5 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b4:f,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B4d0s6 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b4:g,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B3d0s0 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b3:a,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B3d0s1 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b3:b,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B3d0s2 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b3:c,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B3d0s3 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b3:d,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B3d0s4 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b3:e,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B3d0s5 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b3:f,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B3d0s6 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b3:g,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B2d0s0 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b2:a,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B2d0s1 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b2:b,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B2d0s2 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b2:c,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B2d0s3 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b2:d,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B2d0s4 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b2:e,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B2d0s5 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b2:f,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:13 c2t60050768018E82BE98000000000007B2d0s6 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b2:g,raw
lrwxrwxrwx 1 root root 68 Jun 13 15:34 c2t60050768018E82BE98000000000007B2d0 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b2:wd,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:47 c2t60050768018E82BE98000000000007B3d0s7 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b3:h,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:48 c2t60050768018E82BE98000000000007B4d0s7 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b4:h,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:49 c2t60050768018E82BE98000000000007B5d0s7 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b5:h,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:51 c2t60050768018E82BE98000000000007B6d0s7 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b6:h,raw
lrwxrwxrwx 1 root root 67 Jun 13 15:53 c2t60050768018E82BE98000000000007B7d0s7 -> ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b7:h,raw
so we need to know where the raw devices located for oracle to do the dd command to remove the old asm header on the raw device inorder to start the fresh installation
but when we use the command which already given by the unix person who is no longer works here now, we are able to see the following information
root@b2dslbmom3dbb3301 [dev/rdsk] # ls -l c2t600*d0s0|awk '{print $11}' |xargs ls -l
crwxr-x--- 1 oracle oinstall 118, 232 Jun 14 13:29 ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b2:a,raw
crwxr-x--- 1 oracle oinstall 118, 224 Jun 14 13:31 ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b3:a,raw
crwxr-x--- 1 oracle oinstall 118, 216 Jun 14 13:32 ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b4:a,raw
crw-r----- 1 root sys 118, 208 Jul 18 13:19 ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b5:a,raw
crw-r----- 1 root sys 118, 200 Jul 18 13:19 ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b6:a,raw
crw-r----- 1 root sys 118, 192 Jul 18 13:19 ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b7:a,raw
also we are having the information of the mkode, with minor and major number we used for making the softlinks for raw device with ASM.
Cd dev/oraasm/
/usr/sbin/mknod asm_disk_03 c 118 232
/usr/sbin/mknod asm_disk_02 c 118 224
/usr/sbin/mknod asm_disk_01 c 118 216
/usr/sbin/mknod asm_ocrvote_03 c 118 208
/usr/sbin/mknod asm_ocrvote_02 c 118 200
/usr/sbin/mknod asm_ocrvote_01 c 118 192
But the final thing is we need find out where the above configuration located on the host, i think this raw device present method is different than the normal method on solaris??
please help me to proceed my installtion .... thanks in advance....
i am really confused with the following command from where we are getting the oracle disk raw devices information,since there is no info there in /etc/rdsk location (Os is solaris 10)
root@b2dslbmom3dbb3301 [dev/rdsk] # ls -l c2t600*d0s0|awk '{print $11}' |xargs ls -l
crwxr-x--- 1 oracle oinstall 118, 232 Jun 14 13:29 ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b2:a,raw
crwxr-x--- 1 oracle oinstall 118, 224 Jun 14 13:31 ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b3:a,raw
crwxr-x--- 1 oracle oinstall 118, 216 Jun 14 13:32 ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b4:a,raw
crw-r----- 1 root sys 118, 208 Jul 18 13:19 ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b5:a,raw
crw-r----- 1 root sys 118, 200 Jul 18 13:19 ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b6:a,raw
crw-r----- 1 root sys 118, 192 Jul 18 13:19 ../../devices/scsi_vhci/ssd@g60050768018e82be98000000000007b7:a,raw
please help....
Hi Winner;
For your issue i suggest close your thread here as changing thread status to answered and move it to Forum Home » Grid Computing » Automatic Storage Management which you can get more quick response
Regard
Helios
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Hi, i have a new number and I'm trying to activate iMessage but i can't. it is only saying waiting for activation, i have tried a lot of times with not success. i'm not sure if i need to replace the old one to this new one, or what do do. can you help
Troubleshooting iMessage activation:
http://support.apple.com/kb/TS4268 -
For background: I lost my v6 because I had to reformat my whole hard drive. When I reformatted I lost GB and everything else I had. I downloaded GB (unaware of the awfulness that is v10) from the App Store. The fact that v10 does not have all my favorite and most used effects from v6, I uninstalled v10 and redownloaded v6 from my App Store Purchases. I load up v6 only to find that all the default effects are there for each instrument, but when I go to add an effect (i.e. Distortion, Vocal Transformer, Flanger, etc.), instead of the list of classic effects, there's the list of awful AU effects from v10. What gives?!
I uninstalled v10 and redownloaded v6 from my App Store Purchases. I load up v6 only to find that all the default effects are there for each instrument, but when I go to add an effect (i.e. Distortion, Vocal Transformer, Flanger, etc.), instead of the list of classic effects, there's the list of awful AU effects from v10. What gives?!
For me, the "Edit" panel in GB6.0.5 looks like this:
Are you saying, that the upper part with "GarageBand Effects" is missing?
Then check, what is installed in your System Library in the folder
/Library/Application Support/GarageBand/Instrument Library/
(the topmost "Library" folder on your Hard Drive.
You may need to restore the old GarageBand effects and Track settings files from your backup:
i.e look into the folder /Library/Application Support/GarageBand/Instrument Library/Plug-In Settings/
and restore the settings for Chorus, Flanger, Vocal Transformer, Tremolo, whatever effects you are missing.
And also look for missing files in "Track Settings" folder and "Sampler" folder.
What kind of backup do you have? If you have a Time MAchine backup, go back in time to the time before you upgraded to GB 10.
Regards
Léonie -
Hello All. I am working on a form, but I need to format the leading in a multi-line text-field.
Hello All. I am working on a form, but I need to format the leading in a multi-line text-field. The options for the text-field only show a font size option, but no other styling options. Is there a way to format the leading? Thanks!
Not within ID, and I'm not sure it can be done in Acrobat afterward either.
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Do I still need to use the old mobile me backup system for backing up all my data and having it able to get at in case of a crash, or can the icloud reset everything? Because I can not find any structured refrence, as to how it would be done. I am updated to Maverics. Also does the icloud continue if I uninstall the backup to free up space?
MobileMe was discontinued in 2012 and all the data stored on it was deleted, and iCloud can't make backups of Macs.
What I recommend you to make backups is to get an external drive and use Time Machine or an application like Carbon Copy Cloner. With this, you can access to your data everywhere and safely, and then, if you want, use a cloud storage service like CrashPlan. You can keep on using iCloud without backups -
If I am updating an app do I need to remove the old one first?
IIf I am updating an app on my IPad, do I need to remove the old one first eg books or Linkedin?
NO, the update is applied to the existing app. No need to delete the old one.
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Do I need to uninstall the old version 5.7
After the version 6 is installed do I need to uninstall the old version 5.7. After the install I imported a job's photos and realized they had imported to the 5.7 install.
Hi Pete,
Lightroom 5 & 6/CC both are individual applications and can be installed simultaneously, unless you don't need them.
So, in short the answer is Yes you can uninstall the old version in case you don't need it.
Cheers!
~ Arpit -
If I restore my phone from an old backup, will I need to know the old passcode?
If I restore my phone from an old backup, will I need to know the old passcode?
Yes you can delete this backup, & no, it won't delete anything off your phone.
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