I own a 256gb Crucial SSD. Here is some tests I did. What worries me is that I saw results, in regards to *Timing cached reads*. Another person posted these results :
Here are my results :
Some info about the drive in question:
There are 2 *unknowns in there, any idea as to why? Thank you in advance.
PS. Some dmesg output: ata1 is the SSD
This is my fstab
Yet in dmesg I get this EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null)
Code:
sudo hdparm -Tt /dev/sda /dev/sda: Timing cached reads: 12540 MB in 2.00 seconds = 6277.67 MB/sec Timing buffered disk reads: 234 MB in 3.00 seconds = 77.98 MB/sec
Code:
sudo hdparm -Tt /dev/sda /dev/sda: Timing cached reads: 9508 MB in 2.00 seconds = 4757.08 MB/sec Timing buffered disk reads: 1388 MB in 3.00 seconds = 462.04 MB/sec
Code:
sudo hdparm -i /dev/sda
/dev/sda:
Model=M4-CT256M4SSD2, FwRev=070H
Config={ Fixed DTR>10Mbs }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=0
BuffType=unknown, BuffSize=unknown, MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=500118192
IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5
AdvancedPM=yes: unknown setting WriteCache=enabled
Drive conforms to: unknown: ATA/ATAPI-3,4,5,6,7
* signifies the current active mode
PS. Some dmesg output: ata1 is the SSD
Code:
1.848253] ahci 0000:00:11.0: flags: 64bit ncq sntf ilck pm led clo pmp pio slum part [ 1.849437] scsi0 : ahci [ 1.849950] scsi1 : ahci [ 1.850090] scsi2 : ahci [ 1.850554] scsi3 : ahci [ 1.850859] scsi4 : ahci [ 1.851174] scsi5 : ahci [ 1.851240] ata1: SATA max UDMA/133 abar m1024@0xfe80b000 port 0xfe80b100 irq 19 [ 1.851242] ata2: SATA max UDMA/133 abar m1024@0xfe80b000 port 0xfe80b180 irq 19 [ 1.851244] ata3: SATA max UDMA/133 abar m1024@0xfe80b000 port 0xfe80b200 irq 19
Code:
[ 2.340989] ata1.00: ATA-9: M4-CT256M4SSD2, 070H, max UDMA/100 [ 2.340992] ata1.00: 500118192 sectors, multi 16: LBA48 NCQ (depth 31/32), AA [ 2.341351] ata1.00: configured for UDMA/100
Code:
[ 2.333345] ata1.00: configured for UDMA/100 [ 2.333451] scsi 0:0:0:0: Direct-Access ATA M4-CT256M4SSD2 070H PQ: 0 ANSI: 5 [ 2.333558] sd 0:0:0:0: [sda] 500118192 512-byte logical blocks: (256 GB/238 GiB) [ 2.333592] sd 0:0:0:0: Attached scsi generic sg0 type 0 [ 2.333608] sd 0:0:0:0: [sda] Write Protect is off [ 2.333611] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 [ 2.333625] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Code:
# /etc/fstab: static file system information. # # Use 'blkid' to print the universally unique identifier for a # device; this may be used with UUID= as a more robust way to name devices # that works even if disks are added and removed. See fstab(5). # # <file system> <mount point> <type> <options> <dump> <pass> # / was on /dev/sda1 during installation UUID=f7492fc7-03e5-47ce-a7a3-031ff4a06b32 / ext4 noatime,errors=remount-ro 0 1 # swap was on /dev/sda5 during installation UUID=efbc5f08-fc5c-4e72-bfe1-d4fd02a28959 none swap sw 0 0
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