Difference between pages "Solid State Drives (SSD)" and "Template:SupportBlurb"

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[[Support Funtoo]] and help us grow! '''Donate $15 per month and get a free SSD-based [[Funtoo Hosting|Funtoo Virtual Container]]. 25 spots left.
Solid State Drives (SSDs)...
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=Preparation=
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Partitioning
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* MBR/GPT partitioning
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* LVM
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pvcreate --data-alignment 512 (equal to value given as chunksize) ?default? --data-alignment-offset (should not be needed for correctly aligned partitions)<br />
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vgcreate -s 4M (default)<br />
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* mdadm RAID
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mdadm -c 512  Aligns chunksize to 512KB erase block size times 1 data disk (for raid1)<br />
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mkfs.ext4 -b 4096 -E stride=128,stripe_width=128 (erase block size / 4096) (for raid1)<br />
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mkfs.xfs -b 4096 -d sunit=1024,swidth=1024 OR -d su=512K,sw=512K (for raid1)
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* Encrypted with dmcrypt/LUKS
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cryptsetup luksFormat --align-payload 2048 (default)<br />
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cryptsetup luksOpen --allow-discards<br />
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<br />
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File systems
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* EXT4
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* ZFS
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* Others
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=Installation=
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''(Optional) Clearing SSD Memory Cells''<br />
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'''WARNING'''<br />
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Avoid using dd command to overwrite data on SSD. The SSD controller has its own algorithms for allocating writes based on its internal topology. Trying to overwrite data the usual way (e.g. dd if=/dev/zero of=/dev/sda ) is not only futile but will reduce the remaining number of writes to the flash cells. To inform the controller that all data can be purged use hdparm --security-erase. <ref>https://wiki.archlinux.org/index.php/SSD_Memory_Cell_Clearing</ref><br />
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'''Partition creation and alignment'''<br />
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The default alignment of 1MiB provides for proper SSD performance. For gdisk, ensure each partition starts at integer multiple of 2048 (sectors). If you change gdisk's default boundary then the default for other programs may change as a result.
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'''Create File Systems'''
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'''/etc/fstab, mount'''
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=SSD Optimization=
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'''Enable TRIM'''
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'''Mount Options'''<br />
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noatime
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'''I/O Scheduler'''
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'''Use tmpfs for /tmp, /var/tmp, etc.'''
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Revision as of 15:38, January 20, 2015

Support Funtoo and help us grow! Donate $15 per month and get a free SSD-based Funtoo Virtual Container. 25 spots left.