(cobbler) partition problem and solution 2

Preface

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Chapter one
https://blog.csdn.net/GX_1_11_real/article/details/103766100

Next to the last one , What follows is Cobbler Of ks file On disk 16T above when Solutions to partition and format exceptions .

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【1】 Partition

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When the disk capacity of our server is greater than 16TB when ( for example ：12 individual 4T The hard disk of , Group raid5)

because ext4 file system , Default 32 Bits can only support 16T.Centos6 It can only be enabled after upgrading the tool and modifying the configuration 64 Bit mode , Ability to support 16T above . and centos5 And the following systems do not support this method

So we have cobbler ks Use... In configuration ext4, stay Linux During the installation of the operating system , There will be a phenomenon .
When the disk is smaller than 16T when , No problem yet . But when disk space is 16TB When above , Cannot format the full amount , Even after installing the system , We will find that the disk can only see 16T Size

ps：
In fact, this kind of , Reinstall the system at the beginning of discovery . If the service has been run and has been used for storage , It is recommended to remove the service and try to partition again .

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demonstration ：

part /boot --fstype ext4 --size=200
part biosboot --fstype=biosboot --size=1
part / --fstype ext4 --size=102400
part swap --size=4096
part /data --fstype ext4 --size=1 --grow

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swap The size of the configuration is usually related to the size of the memory . When installing the system at ordinary times , Generally, by default, it is divided into memory 2 times , Because it is easier .
If it is k8s The server , Don't configure swap

The basic rule ：

 Physical memory 	    Swap partition （SWAP）
<= 4G	    At least 4G
4~16G	    At least 8G
16G~64G	    At least 16G
64G~256G    At least 32G

–grow Is to allocate all the remaining capacity to data Partition , The disk space is greater than 16T There will be problems .

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resolvent ：

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Method 1 ：
Directly into xfs Or some other recognizable file system

About file system usage ext4 still xfs Or other , Although there are various online assessments , But in fact, it depends on personal habits .
Older employees generally like xfs, Stable and does not require other adjustments . New employees like ext4, because Centos7 Default ext4, And it is generally believed that the new technology is better than the old one .
and lvm Expansion and contraction may be used sometimes , But in fact, the safety and maintenance are poor . I haven't seen other staff use it several times , If there is not enough space, the disk is usually added directly ,ln Soft chain adjustment Directory ; You can directly adjust the disk size on the ECS .

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Method 2 ：
Repartition and format after installation
https://blog.csdn.net/GX_1_11_real/article/details/82053630