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Chris Gibson's AIX and PowerVM blog.
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New virtual Ethernet adapter attribute for largesend on AIX

cggibbo 270000TMUJ | | Comments (6) | Visits (33184)

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The latest versions of AIX now allow largesend on virtual adapters to remain persistent across reboots. I can’t find any information for this attribute in the AIX 7.1 Information center yet.   The new attrribute is called mtu_bypass and can be changed with the chdev command. e.g   ; AIX 7.1 TL1 SP2. # oslevel -s 7100-01-02-1150   ; LARGESEND is off . # ifconfig en1 en1: flags=1e080863,480<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT, CHECKSUM_OFFLOAD(ACTIVE),CHAIN >         inet 10.153.20.46 netmask 0xffff0000... [More]

Tags:  aix mtu_bypass on virtual adapters ethernet largesend chris_gibson

Convert rootvg file systems to JFS2 using alt_disk_copy

cggibbo 270000TMUJ | | Comments (9) | Visits (27678)

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Q: Does alt_disk_copy convert JFS filesystems to JFS2? A: Yes! Starting at 6100-04 , a new flag was introduced that would convert JFS filesystems to JFS2. We now have the -T which does the conversion. http://www-01.ibm.com/support/docview.wss?uid=isg3T1011055   Here’s an example of converting rootvg file systems from JFS to JFS2 using alt_disk_copy .   My lab system was migrated from AIX 5.3 to 7.1 via nimadm . Unfortunately, nimadm does not convert JFS file systems to JFS2 during the migration. So, in this case, even though... [More]

Tags:  convert chris_gibson jfs2 aix alt_disk_copy conversion jfs
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