Why do I not see blkid responses for all partitions ?

[root@server1 ~]# fdisk -l /dev/sda

Disk /dev/sda: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000f0b05

Device Boot Start End Blocks Id System
/dev/sda1 * 1 33 262144 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 33 1308 10240000 83 Linux
/dev/sda3 1308 1945 5120000 83 Linux
/dev/sda4 1945 2611 5348352 5 Extended
/dev/sda5 1946 2073 1024000 83 Linux
/dev/sda6 2073 2139 524288 82 Linux swap / Solaris
/dev/sda7 2139 2155 134485 83 Linux
/dev/sda8 2156 2189 272081 83 Linux
/dev/sda9 2190 2255 529121 83 Linux
/dev/sda10 2256 2289 272081 83 Linux
[root@server1 ~]# blkid /dev/sda*
/dev/sda1: UUID="eae89141-6329-4dee-9ab9-358ef641e08c" TYPE="ext2"
/dev/sda2: UUID="fa60cceb-c967-402e-b240-e89f419a050f" TYPE="ext4"
/dev/sda3: UUID="803011d1-6853-4736-a509-907c83fa8465" TYPE="ext4"
/dev/sda5: UUID="52696129-c7c7-41cb-b7d3-557681e236cb" TYPE="ext4"
/dev/sda6: UUID="8b430f67-695d-4da9-993a-c40786f7a02e" TYPE="swap"
/dev/sda7: UUID="7cd6ffee-3f31-456a-8e0b-33c6bb1734b7" TYPE="ext2"
/dev/sda8: UUID="6ab0235e-c0cb-4619-8eb3-e136204c8800" TYPE="ext2"
[root@server1 ~]#

Hardwareinfo?

Which distro did you install?

blkid reports the content of partitions, e.g. swap, filesystem, LVM. If they have no content known by blkid, nothing is reported.

in your case, sda4 is an extended partition, which blkid ignores, and 9 and 10 are probably unused. The others are filesystems, one is swap.

Is this a GPT disk? There is 8 partition limit for MBR, maybe your blkid is not aware of GPT ... just guessing.

What Redhat distribution/version is running on this system?

/dev/sda4 is an extended partition which would indicate a MBR disk. There used to be a 16 partition limit when libata first came about due to it using the SCSI subsystem. However, with dynamic device generation one can create an arbitrary amount at least in theory. If I remember correctly someone tested to around 150 or so.

Since the fdisk output shows the existence of an extended partition this can't be a disk using GPT partitioning, since GPT doesn't have extended partitionsThere isn't an 8 partition limit for MBR partitioned disks.

First to answer all your questions ..

VMware Vm with Centos 6.7 loaded.
No GPT, this disk was setup to use MBR.
This disk is using partition 4 to create logical disks. Because of the 4 partition limitation.


The problem is solved. Duhhhh ... I forgot to format the logical partitions. ... dang rookies !!!


Thanks for the help guys !!

Oh man, did I get carried away.