I'm about to order a server with 10K RPM SCSI drives.
It allows me to upgrade the storage size, but not the speed (from 10K to 15K).
Does TP offer an upgrade option from 10K SCSI to 15K SCSI drives? If so, how much?
Can someone tell me how much quicker the 15K SCSI drives are. Is it just a simple 50% jump in IO times?
My old server is not SCSI and is struggling with high IOWAIT during backups, stats updates, and high MySQL loads, so I'm keen to get a drive that will make a big difference.
ps. Sorry for all of these individual posts. I thought it would be simpler to keep each issue seperate.
Full Version: 15K SCSI vs 10K SCSI
nforde,
What type of hard drive do you have now? SATA? SAS? IDE? And we do allow 15K SCSI drives, but only on certain servers - which server were you looking at? The Opteron 2212 and/or Single Woodcrest 5130? Verify those and I can tell you for sure what you are looking at hard drive wise.
Kind regards,
PD2
What type of hard drive do you have now? SATA? SAS? IDE? And we do allow 15K SCSI drives, but only on certain servers - which server were you looking at? The Opteron 2212 and/or Single Woodcrest 5130? Verify those and I can tell you for sure what you are looking at hard drive wise.
Kind regards,
PD2
QUOTE (PD2 @ Sep 20 2007, 10:02 AM) 
nforde,
What type of hard drive do you have now? SATA? SAS? IDE? And we do allow 15K SCSI drives, but only on certain servers - which server were you looking at? The Opteron 2212 and/or Single Woodcrest 5130? Verify those and I can tell you for sure what you are looking at hard drive wise.
Kind regards,
PD2
What type of hard drive do you have now? SATA? SAS? IDE? And we do allow 15K SCSI drives, but only on certain servers - which server were you looking at? The Opteron 2212 and/or Single Woodcrest 5130? Verify those and I can tell you for sure what you are looking at hard drive wise.
Kind regards,
PD2
I believe it's an EIDE drive. It's 120GB -
hdparm -i /dev/hda
/dev/hda:
Model=WDC WD1200JB-00CRA0, FwRev=16.06V16, SerialNo=WD-WMA8C3671019
Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }
RawCHS=16383/16/63, TrkSize=57600, SectSize=600, ECCbytes=40
BuffType=DualPortCache, BuffSize=8192kB, MaxMultSect=16, MultSect=off
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=234441648
IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 *udma2 udma3 udma4 udma5
AdvancedPM=no WriteCache=enabled
Drive conforms to: device does not report version:
* signifies the current active mode
I believe this is the one - http://www.amazon.com/Western-Digital-WD12...l/dp/B000077X5L
I'm 99% sure I'm going to go with either the Opteron 2212 or Single Woodcrest 5130 (definitely with SCSI). Does my choice make a difference to the 15K SCSI cost? If so, can I get a cost for each of these 2 options?
I have SCSI drives in both of my servers and one drive is the 10k version, the other the 15k version. Both are 36GB models, so slightly older than what you are considering.
It can be hard to tell sometimes the differences, but what I will say is that they are very reliable, and never cause performance lags.
Good luck with your search!
It can be hard to tell sometimes the differences, but what I will say is that they are very reliable, and never cause performance lags.
Good luck with your search!
QUOTE (nforde @ Sep 20 2007, 07:11 AM)
I believe it's an EIDE drive. It's 120GB -
hdparm -i /dev/hda
/dev/hda:
Model=WDC WD1200JB-00CRA0, FwRev=16.06V16, SerialNo=WD-WMA8C3671019
Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }
RawCHS=16383/16/63, TrkSize=57600, SectSize=600, ECCbytes=40
BuffType=DualPortCache, BuffSize=8192kB, MaxMultSect=16, MultSect=off
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=234441648
IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 *udma2 udma3 udma4 udma5
AdvancedPM=no WriteCache=enabled
Drive conforms to: device does not report version:
* signifies the current active mode
I believe this is the one - http://www.amazon.com/Western-Digital-WD12...l/dp/B000077X5L
I'm 99% sure I'm going to go with either the Opteron 2212 or Single Woodcrest 5130 (definitely with SCSI). Does my choice make a difference to the 15K SCSI cost? If so, can I get a cost for each of these 2 options?
hdparm -i /dev/hda
/dev/hda:
Model=WDC WD1200JB-00CRA0, FwRev=16.06V16, SerialNo=WD-WMA8C3671019
Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }
RawCHS=16383/16/63, TrkSize=57600, SectSize=600, ECCbytes=40
BuffType=DualPortCache, BuffSize=8192kB, MaxMultSect=16, MultSect=off
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=234441648
IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 *udma2 udma3 udma4 udma5
AdvancedPM=no WriteCache=enabled
Drive conforms to: device does not report version:
* signifies the current active mode
I believe this is the one - http://www.amazon.com/Western-Digital-WD12...l/dp/B000077X5L
I'm 99% sure I'm going to go with either the Opteron 2212 or Single Woodcrest 5130 (definitely with SCSI). Does my choice make a difference to the 15K SCSI cost? If so, can I get a cost for each of these 2 options?
Just replied in your other post about this.
PD2
Unfortunately I wasn't allowed to get the 15K SCSI drives with the Woodcrest server, so I'm going with 10K SCSI which I'm sure will be a huge step up from my current server with (non optimised) 7,200RPM EIDE.
QUOTE (nforde @ Sep 20 2007, 06:25 PM)
Unfortunately I wasn't allowed to get the 15K SCSI drives with the Woodcrest server, so I'm going with 10K SCSI which I'm sure will be a huge step up from my current server with (non optimised) 7,200RPM EIDE.
Oh, you better believe it will be! 7200 EIDE vs. 10K SCSI is like a turtle vs. a rabbit race! LOL! Enjoy the server's new found life!
PD2
10k SCSI is a world of difference from the 7200 rpm ide / sata drives when the going gets tuff. (and there are lots of io requests thrown at it, while you're doing a backup for example.)
15k scsi at home delivers ~100 MB/s max vs 75 MB/s for 10k scsi -- I don't notice a huge difference like ide vs. scsi but when I am ready for my next server, I hope 15k SCSI/SAS is an option.
15k scsi at home delivers ~100 MB/s max vs 75 MB/s for 10k scsi -- I don't notice a huge difference like ide vs. scsi but when I am ready for my next server, I hope 15k SCSI/SAS is an option.
QUOTE (Jeff @ Sep 21 2007, 06:52 AM)
10k SCSI is a world of difference from the 7200 rpm ide / sata drives when the going gets tuff. (and there are lots of io requests thrown at it, while you're doing a backup for example.)
15k scsi at home delivers ~100 MB/s max vs 75 MB/s for 10k scsi -- I don't notice a huge difference like ide vs. scsi but when I am ready for my next server, I hope 15k SCSI/SAS is an option.
15k scsi at home delivers ~100 MB/s max vs 75 MB/s for 10k scsi -- I don't notice a huge difference like ide vs. scsi but when I am ready for my next server, I hope 15k SCSI/SAS is an option.
Thanks guys! I've ordered my server which should have a LOT more grunt than the current one, so I'm REALLY looking forward to seeing it in action...
Sweet! Congratulations on your new box!
I've always loved that "new server smell." Brooke knows what I'm talking about.
I've always loved that "new server smell." Brooke knows what I'm talking about.
These don't graphically tell the full story as they're just a measure of sustained throughput in the graph and don't "show" the latency difference (5 (15k) vs 7 (10k) vs 13 ms (7.2k)), but...
15K vs. 10K SCSI performance (maxtor atlas 15k2 vs. 10k4)
7.2K SATA drives for comparison (no raid here - just a WD RE2 400 GB and 500 GB drive connected to an adaptec 2820SA configured as JBOD)
on the other hand, put two 7200 RPM SATA drives into a RAID0 array, and you get better sustained throughput (but this doesn't tell the story for a web server where you have lots and lots of little reads where the difference in latency from a 15K to a 7.2K drive is a big factor... plus you'd need 4 drives to do this as RAID10 as I wouldn't run RAID0 for any critical app and double my chance of failure + much less chance of partial data recovery from RAID0... and then you could get a 15K drive cheaper and have much faster seek times (unless you need the huge increase in disk space from the array)
15K vs. 10K SCSI performance (maxtor atlas 15k2 vs. 10k4)
7.2K SATA drives for comparison (no raid here - just a WD RE2 400 GB and 500 GB drive connected to an adaptec 2820SA configured as JBOD)
on the other hand, put two 7200 RPM SATA drives into a RAID0 array, and you get better sustained throughput (but this doesn't tell the story for a web server where you have lots and lots of little reads where the difference in latency from a 15K to a 7.2K drive is a big factor... plus you'd need 4 drives to do this as RAID10 as I wouldn't run RAID0 for any critical app and double my chance of failure + much less chance of partial data recovery from RAID0... and then you could get a 15K drive cheaper and have much faster seek times (unless you need the huge increase in disk space from the array)
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