Question

11

How do I check whether partitions on my SSD are properly aligned?

rated 0 times [ 11] [ 0] / answers: 1 / hits: 49856 / 1 Year ago, wed, august 31, 2022, 5:02:51

I just installed ubuntu on my new intel SSD. Now I am not sure, whether paritions are properly aligned in respect to my specific SSD.

Here's my fdisk output.

$ fdisk -l



    Platte /dev/sda: 120.0 GByte, 120034123776 Byte

255 Köpfe, 63 Sektoren/Spur, 14593 Zylinder

Einheiten = Zylinder von 16065 × 512 = 8225280 Bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x000a6294



   Gerät  boot.     Anfang        Ende     Blöcke   Id  System

/dev/sda1   *           1        1913    15360000   83  Linux

/dev/sda2            1913       14058    97558528   83  Linux

/dev/sda3           14058       14594     4300800   82  Linux Swap / Solaris

Also, do I still need to align my SSD at all, since I am using TRIM on the ext4 partitions by mounting them with the discard flag.

If it is the case, that my partitions are not properly aligned, what could I do to fix this without having to reinstall everything?

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answered 1 Year ago llianconclad · Accepted Answer

Ensuring SSD alignment with parted tool looks like a pretty good guide for aligning your filesystem on the SSD:

Get the block size of your SSD in bytes (there are heaps of tips, and I don't know which ones will work for which hardware).

Start the partition editor:
```
sudo parted
```

Show the partition table:
```
p
```

Verify that the numbers in the Start and Size columns are divisible by the block size.