Why Misaligned Partitions are a Problem for SSD.

The Misaligned partitions problem is even more important for SSD drives than for traditional hard disk drives. Many modern SSD drives have an internal memory page size 4096 bytes or larger accordingly to 4K size, which are some analogue for 4K sectors. Thus all previously mentioned problems are the same for SSD partitions alignment.

This issue of SSD misalignment was highlighted in a recent OCZ forum where it was stated:

Take note here, partition alignment with SSD is the most important factor you have to deal with when installing your new drive. Tuning the drive’s alignment can add 30 to 50% more performance so failing to apply the correct alignment could ruin the experience you have with the drive.

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There is one crucial SSD issue besides file system speed decline (which is not so noticeable in comparison to traditional HDD). It is the SSD memory cells degradation after some amount of write operations. So if partitions on SSD are misaligned beside downgraded system speed you put your solid state drive in danger. After partitions alignment, PAT eliminates all redundant read/write operations and thus provides speed boost and grants the SSD a longer lifetime.

Is SSD alignment an issue for you? Find out here.

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