Check disk working but wrong partition

[9acca9]

HI

I have this strange issue.

Have this

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sda                                                                                 sda              502M root  disk  brw-rw----
└─sda1          xfs               00d3ba7f-d020-4dee-8131-7bf7fe031d0f   /boot      └─sda1           500M root  disk  brw-rw----
sdb                                                                                 sdb             49,5G root  disk  brw-rw----
└─sdb1          LVM2_member       UDkkvc-hvHu-XWM2-iesN-rZYa-PVCf-BGhjv8            └─sdb1          49,5G root  disk  brw-rw----
  ├─centos-root xfs               9886fee8-0d3d-4c33-9b5a-b2157e6c9514   /            ├─centos-root 47,5G root  disk  brw-rw----
  └─centos-swap swap              c48a22b7-2433-43ef-ab9b-d08929ac8974   [SWAP]       └─centos-swap    2G root  disk  brw-rw----
sr0                                                                                 sr0             1024M root  cdrom brw-rw----

I want to check the sdb1 partition.
i try this on the client machine

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/usr/lib64/nagios/plugins/check_disk -w 20% -c 10% -p /dev/sdb1
DISK OK - free space: /dev 895 MB (100% inode=99%);| /dev=0MB;716;805;0;895

¿?

Some help please.
(i dont speak english)

[dwhitfield]

Could you provide the output of fdisk -l?

It's no problem to use Google Translate or whatever, BUT, please do *not* translate the commands and outputs. Apologies if that seems obvious, but we've had some people do that, and it makes it impossible to help. Thanks!

[9acca9]

Hi, thanks

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Disk /dev/sdb: 53.1 GB, 53118763008 bytes, 103747584 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Identificador del disco: 0x4d5c014b

Disposit. Inicio    Comienzo      Fin      Bloques  Id  Sistema
/dev/sdb1             128   103743615    51871744   8e  Linux LVM

Disk /dev/sda: 526 MB, 526385152 bytes, 1028096 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Identificador del disco: 0x19ac9e08

Disposit. Inicio    Comienzo      Fin      Bloques  Id  Sistema
/dev/sda1   *         128     1024127      512000   83  Linux

Disk /dev/mapper/centos-root: 51.0 GB, 50964987904 bytes, 99540992 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mapper/centos-swap: 2147 MB, 2147483648 bytes, 4194304 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

its like the check disk just "check" "/dev", for example look this:

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[root@squid ~]#  /usr/lib64/nagios/plugins/check_disk -w 20% -c 10% -p /dev/disk/by-uuid/00d3ba7f-d020-4dee-8131-7bf7fe031d0f
DISK OK - free space: /dev 895 MB (100% inode=99%);| /dev=0MB;716;805;0;895
[root@squid ~]#  /usr/lib64/nagios/plugins/check_disk -w 20% -c 10% -p /dev/disk/by-uuid/c48a22b7-2433-43ef-ab9b-d08929ac8974
DISK OK - free space: /dev 895 MB (100% inode=99%);| /dev=0MB;716;805;0;895
[root@squid ~]#  /usr/lib64/nagios/plugins/check_disk -w 20% -c 10% -p /dev/disk/by-uuid/9886fee8-0d3d-4c33-9b5a-b2157e6c9514
DISK OK - free space: /dev 895 MB (100% inode=99%);| /dev=0MB;716;805;0;895

different uuid, same result. and just "/dev"...

[avandemore]

/dev/disk/by-uuid/00d3ba7f-d020-4dee-8131-7bf7fe031d0f is a symlink to the real block device. Specify the real block device in your command.

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# ll /dev/disk/by-uuid/f415dfc2-c131-472f-ad0d-6174a5c91d93
lrwxrwxrwx 1 root root 10 Nov 16 15:55 /dev/disk/by-uuid/f415dfc2-c131-472f-ad0d-6174a5c91d93 -> ../../sda1
# /usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/sda1
DISK OK - free space: /boot 292 MB (58% inode=99%);| /boot=204MB;396;446;0;496

[9acca9]

Ok, but, the same.

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 ll /dev/disk/by-uuid/9886fee8-0d3d-4c33-9b5a-b2157e6c9514
lrwxrwxrwx 1 root root 10 nov 14 13:54 /dev/disk/by-uuid/9886fee8-0d3d-4c33-9b5a-b2157e6c9514 -> ../../dm-0

 /usr/lib64/nagios/plugins/check_disk -w 20% -c 10% -p /dev/dm-0
DISK OK - free space: /dev 895 MB (100% inode=99%);| /dev=0MB;716;805;0;895

Anyway, i try this:

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 blkid
/dev/sdb1: UUID="UDkkvc-hvHu-XWM2-iesN-rZYa-PVCf-BGhjv8" TYPE="LVM2_member" 
/dev/sda1: UUID="00d3ba7f-d020-4dee-8131-7bf7fe031d0f" TYPE="xfs" 
/dev/mapper/centos-root: UUID="9886fee8-0d3d-4c33-9b5a-b2157e6c9514" TYPE="xfs" 
/dev/mapper/centos-swap: UUID="c48a22b7-2433-43ef-ab9b-d08929ac8974" TYPE="swap" 

 /usr/lib64/nagios/plugins/check_disk -w 20% -c 10% -p /dev/mapper/centos-root
DISK OK - free space: / 45234 MB (93% inode=99%);| /=3345MB;38864;43722;0;48580

that's ok. but just for knowlegde... it's ok put that?, i mean "/dev/mapper/centos-root"

Thanks for your help.

[dwhitfield]

it's ok put that?, i mean "/dev/mapper/centos-root"

Could you clarify your question? Are you asking if the mapping will change? Are you asking if it is a security concern? Are you asking if it reports correctly?

Thanks!