[bglug] Configurazione SSD per Linux

[Giovanni]

On 18/08/2012 23.47, Matias Seco wrote:
> Nuovo quesito :)
> Sempre in giro su internet^^, ho letto che per sfruttare al meglio un 
> SSD bisogna seguire i seguenti passi:
>
> 1. Formattazione disco con Allineazione appropiata
> 2. Creazione file-system, anche questo settando correttamente 
> l'allineamento
>
> Per il 1° ho visto che strumento come gdisk o gparted effettuano 
> automaticamente questa operazione
> Il 2° l'ho letto in giro: ma non lo dovrebbe fare automaticamente ext4?
>

e questi i miei test !disco : ssd Corsair force series 3 120Gb - SATA 
6Gb/s .Max Sequential Read/Write (using ATTO Disk Benchmark): 550 MB/s 
sequential read --- 520 MB/s sequential write .Max Random 4k Write 
(using IOMeter 08): 85k IOPS (4k aligned)

========
       1
========


formattato con gparted xfs 120gb
----------------------
2 mib free
111.79gib
3.46mib free

sudo hdparm -t /dev/sdh

/dev/sdh:
  Timing buffered disk reads: 930 MB in 3.01 seconds = 309.42 MB/sec
server@server-System-Product-Name:/media/155d3571-ecd4-46fe-bd94-3277a112081a/cf$ 
sudo hdparm -t /dev/sdh

/dev/sdh:
  Timing buffered disk reads: 922 MB in 3.00 seconds = 306.99 MB/sec
server@server-System-Product-Name:/media/155d3571-ecd4-46fe-bd94-3277a112081a/cf$ 
sudo hdparm -t /dev/sdh

/dev/sdh:
  Timing buffered disk reads: 874 MB in 3.00 seconds = 291.03 MB/sec


========
       2
========
Link: 
http://www.ocztechnologyforum.com/forum/showthread.php?77769-A-Simple-How-To-on-Partitioning-and-Alignment-on-GNU-Linux-using-fdisk 
[^]


sudo fdisk -H 32 -S 32 /dev/sdh
p
n
p
1
2048
+232783871
w

sudo hdparm -t /dev/sdh

/dev/sdh:
  Timing buffered disk reads: 1090 MB in 3.00 seconds = 362.93 MB/sec
server@server-System-Product-Name:/$ sudo hdparm -t /dev/sdh


========
       3
========

sudo fdisk -H 32 -S 32 /dev/sdd
p
n
p
1
4096
+232783871
w

sudo hdparm -t /dev/sdd

/dev/sdd:
  Timing buffered disk reads: 890 MB in 3.01 seconds = 296.15 MB/sec
server@server-System-Product-Name:~$ sudo hdparm -t /dev/sdd


========
       4
========
sudo dd if=/dev/zero of=/dev/sdd count=1 bs=1k
sudo fdisk -H 224 -S 56 /dev/sdd
p
n
p
1
2048
+232783871
w

sudo hdparm -t /dev/sdd

/dev/sdd:
  Timing buffered disk reads: 860 MB in 3.00 seconds = 286.43 MB/sec


========
5
========

hdparm -i /dev/sdd
sudo gparted -> delete all partition
sudo apt-get install lvm2 dmsetup mdadm
sudo pvcreate --dataalignmentoffset 7s /dev/sdd
sudo pvcreate --dataalignmentoffset 7s /dev/sdd
sudo vgcreate wd2tsata /dev/sdd
sudo lvcreate --name vm_storage --size 111G wd2tsata


sudo mkfs.xfs -b size=4096 -s size=4096 -N /dev/wd2tsata/vm_storage
meta-data=/dev/wd2tsata/vm_storage isize=256 agcount=4, agsize=7274496 blks
          = sectsz=4096 attr=2, projid32bit=0
data = bsize=4096 blocks=29097984, imaxpct=25
          = sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0
log =internal log bsize=4096 blocks=14208, version=2
          = sectsz=4096 sunit=1 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0


sudo hdparm -t /dev/sdd
dev/sdd:
  Timing buffered disk reads: 896 MB in 3.01 seconds = 298.13 MB/sec
server@server-System-Product-Name:~$ sudo hdparm -t /dev/sdd


sudo hdparm -t /dev/dm-0
/dev/dm-0:
  Timing buffered disk reads: 842 MB in 3.01 seconds = 280.16 MB/sec





> Note: mi interessava questo particolarmente, sapendo che ci sono poi 
> altri elementi (trim, distribuzione filesystem)
>
> Salut
>
>
> --
> Sito BgLUG: http://www.bglug.it
> Mailing list: http://lists.linux.it/listinfo/bglug


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