#advanced-format

How-to: Using 4k drives with md/LVM/dm-crypt #development #programming #fix

Using 4k drives with md/LVM/dm-crypt

I know that I have to align my 4k drives by a multiple of 8 sectors, but what about md-RAID / LVM / dm-crypt? How do I tell these layers that my drive is 4k? If they don’t respect the 4k sector size, the partition alignment is useless. How do I align LVM/md/crypto-layers? Thanks.

Answer [by Porch]: Using 4k drives with md/LVM/dm-crypt

Most newer distributions…

Solution: mdadm and 4k sectors (advanced format) #answer #programming #dev

mdadm and 4k sectors (advanced format)

There are numerous questions on Serverfault about aligning 4k sectors disks, but one thing is not really clear to me yet.

I successfully aligned my RAID1+LVM. One of the things I did was use mdadm superblock version 1.0 (which stores the superblock at the end of the disk).

The manpage says this:

The different sub-versions store the superblock at different…

Answer: How can I set the disk partition alignment using linux tools? #answer #solution #development

How can I set the disk partition alignment using linux tools?

After reading Disk Partition Alignment Best Practices for SQL Server, I just want to give those advices a try, but on my linux test server. What are the required parameters in order to set the partition offset (for fdisk if possible, or any other partitioning tool available on a linux live cd)?

Answer [by Kevin Kuphal]: How can I set…

How to: How can I set the disk partition alignment using linux tools? #it #solution #programming

How can I set the disk partition alignment using linux tools?

After reading Disk Partition Alignment Best Practices for SQL Server, I just want to give those advices a try, but on my linux test server. What are the required parameters in order to set the partition offset (for fdisk if possible, or any other partitioning tool available on a linux live cd)?

Answer [by Kevin Kuphal]: How can I set…

Answer: LVM dangers and caveats #fix #it #computers

LVM dangers and caveats

I have recently started using LVM on some servers for hard drives larger than 1 TB. They’re useful, expandable and quite easy to install. However, I could not find any data about the dangers and caveats of LVM.

What are the downsides of using LVM?

Answer [by RichVel]: LVM dangers and caveats

Summary

Risks of using LVM:

Vulnerable to write caching in kernel and hard…

Fix: LVM dangers and caveats #development #answer #programming

LVM dangers and caveats

I have recently started using LVM on some servers for hard drives larger than 1 TB. They’re useful, expandable and quite easy to install. However, I could not find any data about the dangers and caveats of LVM.

What are the downsides of using LVM?

Answer [by RichVel]: LVM dangers and caveats

Summary

Risks of using LVM:

Vulnerable to write caching in kernel and hard…