XSAN Read & Write Speed Low

I have an XSAN Setup 2 Dual G5 integrated in an Xsan with a 2TB of Xserve with Silkworm 3200 Fiber Optic Switch I use the 2 Dual G5 as the controller. When I try to use the Blackmagic Disk Speed Test I get a reading of Disk Read 140.4MB/s Disk Write 100.2MB/s. Based on the forum it seems its a bit slow can anyone help me with this..
I don't have a Metadata Controller I just put all the 2TB pool into anydata option my stripe breadth is 256 blocks. Im just a beginner in Xsan and just try to run and test it having a small amount of knowldge with XSAN system.
Im using Raid 5 for my Xserve raid
Hope you could give me a great advise thanks..

There's no way to take an existing volume and "de-merge" it into separate metadata and data volumes. You'd also need to delete and re-create your RAID sets appropriately.
If your performance is acceptable, you can stay as-is. But long run, you may need to change it. There are a number of options explained in the book.
You can get it from Amazon for like $13.86:
http://www.amazon.com/exec/obidos/tg/detail/-/0321369009/qid=1125007259/sr=8-1/r ef=sr8_xs_ap_i1xgl14/103-6755976-2921461?v=glance&s=books&n=507846
Probably other places as well, but Amazon's pretty easy

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Are my read/write speeds up to snuff? MacPro Octo 2.26

What are typical and good read/write speeds I can expect on my MacPro Octo 2.26 10GB Ram.
According to iStat, on a simple copy, I get about 65-70 MB/s read from a WD 640 caviar black internal bay, and 65-70 MB/s write to a WD 640 caviar black internal bay. Are there any apple docs that explain what we can expect, how to enhance? You can skip RAID talk, this is just basic stock computer and best operating procedures I'm speaking of. Thanks!
The OS is on a WD 74 Raptor drive.

Drives keep evolving.
It depends on what you copy, and what matters, or, where if any place is there a bottleneck?
Newer 10K VR drives maybe, boot drive is important.
SSDs definitely boost system.
Isolating I/O between drives (system, scratch, media, etc) really helps so all the work and I/O is spread out.
Newer 1TB and above drives with 500GB platters and higher density, too.
Best differs from video editing, to mild editing of files, to very heavy work in CS4.
Also, keeping your drives to 50% free space, or what I do for some drives is short-stroke so I really only use one outer partition to work with and use the rest for junk and inactive archive/backup and storage.
iStat - never used it and definitely not for benchmarking drives.

G710 hard drive read/write speed

Hello,
I have a brand new Ideapad G710 with 1TB Serial ATA 2, 5400rpm with advertised speed of 3 Gb/s (= 384MB/s).
I am running Windows 7 ultimate x64 with SP1.
When I test hard drive read/write speed (I used CrystalDiskMark) I get results of about 100MB/s, which is 3-4 times slower than it should be.
I am not running any resource heavy applications (Resource monitor reports Disk I/O to be 0 most of the time in idle state). I have 3 partitions, each with 16-32GB paging file size and all are >90% empty. All partitions have been defragmented before testing.
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Solved!
Go to Solution.

hi Daew,
Welcome to the Lenovo Forums.
The results that you got while running CrystalDiskMark is normal. The SATA 2 (3Gb/s) that you mentioned is actually the SATA interface support, not the actual read/write performance.
If you have a Seagate HDD (eg. ST10000LM024), check these specs
From the above specs, the unit has a cache that has a read/write max speed of 145 MB/s but there are environmental factors and power requirements to get this speed (eg. read/write speed on AC power is differente from battery power).
AFAIK, if this is the specs that is design for this drive, there's no way to speed it up.
If you're planning to upgrade in the future though, you can get an SSD for faster read/write.
Regards
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Thunderbolt drive Read/Write speeds have significantly dropped

I got a new Western Digital Thunderbolt VelociRaptor drive. When I did speed tests on it using "BlackmagicDesign" Speed Test software initially (when empty) the drive was giving me read and write speeds of 350 MB/s. Now however I have 90% of the drive occupied with data and the read/write speeds have dropped significantly to 230 MB/s. Any ideas as to why and how I could improve this?
Thanks

ishjen wrote:
Anybody know how fast the read/write speeds are with a USB hard drive and the Airport Extreme Base Station?
Welcome to Apple's discussion groups.
Apple's AirPort base stations aren't known for fast file serving, but for most purposed they're fast enough.
I can't comment specifically on your Aperture plan, but with some software it's important to avoid simultaneous access by more than one user.

Hard drive read write speeds are too slow

I was having an issue with 17inch macbook pro. was getting 4.0mb/s read write speed tops. and smart status failure.
So i replaced the drive. The new drive is a 7200 RPM 500GB WD drive. I'm getting 12.0mb/s on top speed. Computer feels a little quicker but still slow overall.
I ran this test on a fresh install of snow leopard.
Is it just me or do those read/write speeds on the new drive still seem slow?
2007 17inch macbook pro with 2gigs of ram.

That does seem slow - on the other hand, what are you using to measure it?
My 1Tb 2.5" SATA drive performance shows as follows: http://grab.by/7zau
Xbench Stats: http://grab.by/7zau
Anything in System Profiler? http://grab.by/7zaR
Link Speed at 3 Gb?

I'm looking for the read/write speeds for my Mac's.

I'm looking for read/write speeds for my Macs, but I can't find consistent data. Does anyone know the speeds or know where I can look? I have three computers:
iMac late 2013 Fusion/3TB i7
iMac late 2009 1TB i7
Macbook Air 256GB i5
Thanks,

I think the feature is called Voice Over, and I think it's now compatible with Reader:
http://support.apple.com/kb/HT3598?viewlocale=en_US&locale=en_US

Sequential read/write speeds

How can i measure sequential read/write speeds?
is there any API, library that can help me?

I suggest you leave it like that then. Benchmarkings are all synthetic ones. The real life performance is what we need. There are many benchmark enhancement techniques other SSD players in the market improvise on their product so that it's sell off like anything. At the end of the day, it all depends on what you're getting out of your SSD .
Related: http://www.anandtech.com/show/7337/corsair-force-ls-240gb-review
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Read/Write speeds with Airport Extreme and USB Hard Drives

Anybody know how fast the read/write speeds are with a USB hard drive and the Airport Extreme Base Station?
My Setup
I have a 17 MBP (2010) and a 13 MBP (2011) - no SSD's
MBP generally connect via 802.11n 5Ghz with a very strong signal
Gigabit connection on a Windows Desktop
I have a variety of external drives (7200, 5400, Drobo) at varying capacity (320GB, 2TB, 5.6TB)
Goals
Backup: Time machine
Backup: File copies of pictures and home videos (greater than 1GB files)
Backup: Crashplan
File sharing: Aperture libraries--not sure if that is possible or practical. That is something that I need to research further...but on the off chance people have experience with it.
Thanks!

ishjen wrote:
Anybody know how fast the read/write speeds are with a USB hard drive and the Airport Extreme Base Station?
Welcome to Apple's discussion groups.
Apple's AirPort base stations aren't known for fast file serving, but for most purposed they're fast enough.
I can't comment specifically on your Aperture plan, but with some software it's important to avoid simultaneous access by more than one user.

Toshiba SSD vs Samsung SSD and inconsistent read/write speeds

I've heard that some of the 2011 Airs are shipping with Toshiba SSDs where others have the Samsung SSDs. Apparently the Toshiba ones are considerably slower and are more likely to be in the 13" models where the Samsung SSDs are more likely to be in the 11" models. I was curious if anyone out there has an 11" model with the 256GB option, and if so, which SSD did you get in yours? See here: http://9to5mac.com/2011/07/25/2011-macbook-air-ssd-speeds-are-not-consistent/#mo re-85182
Thanks

Trey992 wrote:
I'm really disappointed, considering I spent $1200 on a portable laptop, I expect it to be pretty much perfect, and it's a let down knowing I didn't get what a lot of other people paying the same price might be getting. Anything on this Apple?
Are you looking to get a response from Apple here? If so you're going to be left wanting. This is a user-to-user discussion forum, if you wish to communicate with Apple you'll need to get on the phone with AppleCare or bring it into the store.
You can also return the machine and buy a new one, it's a 50/50 chance.
I have the Toshiba drive in my 13" MBA with the 128GB SSD. A co-worker has the same model machine with a Samsung drive.
As Apple doesn't promise a minimum SSD read/write speed I don't really see any justification for them to offer an exchange on a unit unless it's defective (which this would not be considered defective in their eyes). Thus my recommendation for the return. The other problem is there's no discernible markings on the outside of the box that indicate which drive is in the machine, plus Apple doesn't let you "try before you buy."
Even given the slower Toshiba speeds, I'd be really curious to see someone max out the capabilities of either drive.

Required read write speeds

hey
i'm currently in the process of building a NAS and have been previously working with a firewire hard drive box..
my question is simple (at least i think so).....what are speeds that are typically seen when editing with firewire boxes....i was using a 800 firewire box and i know real world situations you don't get 800 mb/s....
i edit HD footage (captured AIC 1080i @ 60fps) and this new NAS box that i'm building says it can achieve anywhere between 22-45mb/s read/write speeds
will this be fast enough?
thanks for your time guys!
Thanks
~Will-i-am~

it can achieve anywhere between 22-45mb/s read/write speeds
will this be fast enough?
If all you deal with is DV.
x

Macbook pro 2011 HD read/write speed

My 2 and half year old macbook pro seemed little slow so i did read/write speed test and it shows about 45MB/sec read/write speed. It is normal for a old 5400rpm hard disk. I have mountain lion.

Yes, that's probably about normal for an older, slow drive.

Macbook Pro 1.1 how to improve read/write speed

Hello,
I am looking to improve the read/write performance of a 2006 2.16 Intel Core Duo Macbook Pro with 2gb RAM (the max), that I use on a specific job in a specific workflow.
In the workflow there are three retouchers using three different MBPs and transferring files via Ethernet network to a fourth MBP (the one in question) which is used as a dropbox, if you like.
So the MBP in question has no applications running. Files are saved to it and opened from it and saved back to it.
How can I improve read/write speed on this MBP under these conditions?
Would installing an SSD be the answer? Or is it really a processor issue and there's nothing to be done? I figure RAM doesn't really come into it, but in any case 2GB is the max this model can accept.
Many thanks in advance.

An SSD would definitely improve read/write speed. However, depending on capacity needed, are you sure you want to sink the money into this machine? Start here:
http://eshop.macsales.com/shop/hard-drives/2.5-Notebook/

Increase Read/Write Speed of Macbook Pro?

Hey there,
Recently I've decided to purchase a BlackMagic Design Thunderbolt to use with my Late 2011 MacBook Pro in order to capture video game footage. I have test recorded and found that there is a lot of dropped frames and playback is nearly impossible.
I have run a disk speed test and it shows that my MacBook Pro is lacking the required read and write speeds that require me to capture my footage at the desired framerate.
How do I go about increasing those speeds? I know that I should replace the Solid-State Drive (SSD) but where do I start in terms of purchasing one?
Any help would be greatly appreciated.

I still think you should upgrade your HD and RAM as you have been advised.
However, you confirmed my suspicion that you are using Uncompressed video setup, and that's the primary cause of your issues. Uncompressed is unnecessarily huge and would not be used in a consumer setting such as PS3 or even an HDTV.
Before I recommend QT ProRes, however, what is the exact connection you are making ... are you going from your PS3 to your HDTV and then from there to your BlackMagic? Or directly from your PS3 to Blackmagic? What AV out are you using on the PS3? Is your PS3 a PAL version?
You mentioned it's a PAL HDTV and you are using 720p60. That doesn't make sense. 720p60 would be NTSC, not PAL. Mismatching PAL & NTSC video can cause all sorts of headaches; there's a big difference between the frame rates. This may be the cause of your apparently dropped frames. If this is truly PAL then then 720p50 or 1080i50 would be appropriate settings.

What is the Read/Write speed for a 250gb Serial ATA hard drive?

Hello. I've been having some problems via my Mac (Kernel panic at start up) and is thinking wether or not it is the hard drive.
Does anyone know what the Write speed is for the specified hard drive. I'm currently getting about 5 mbps and that feels a bit slow
I'm on a Macbook Pro mid 2009 model.
Thanks in advance
Ashley.

I haven't got the logs. I had to reinstall everything in order to get it to start up (Couldn't find ACPI?)
And I'm only asking because it seems like my laptop HD is running slow. Is it normally about 5mbps for a 5400rpm HDD?

[Solved]Variable read/write speed with WD Passport 1 TB external drive

I have this drive connected to my Arch Linux box. Whenever I transfer large files (I use it to backup) the write speed drops from 30M/s to sometimes a few KB/s and then speeds up again ! This drive is connected via an USB 2.0 port with a specific cable which is 2.0 at one end (to connect to my motherboard) and 3.0 at the other end (to connect to the drive). Could this be related to the kernel SES driver which is used (buffer problem maybe)?
This speed problem is that serious that backups take very long and become almost not feasable.
Thanks in advance
Last edited by Strider (2014-02-02 21:00:54)

Jason,
this drive has 3 use cases (my PC is dual boot Arch / Windows Vista) :
1) Backup my PC linux box using a rsync front end (luckybackup) here source and target are ext4 in target always and source is either ext4 or lvm on raid.
2) Backup of my PC Windows Vista using an own written script which uses ntfsclone where source and target are ntfs.
3) Backup of my Windows 7 laptop
The problem is that I have performance issues in scenario's 1 & 2 (but not always) and never in case 3. I think this might finally be hardware related ...
Just before writing this post I connected the drive and it didn't even appear in my file manager (nemo under cinnamon 2.0). So I ran a journalctl and here is the outcome :
Feb 02 09:55:33 Megatron kernel: usb 2-4: new high-speed USB device number 3 using ehci-pci
Feb 02 09:55:33 Megatron kernel: usb 2-4: new high-speed USB device number 4 using ehci-pci
Feb 02 09:55:33 Megatron mtp-probe[911]: checking bus 2, device 4: "/sys/devices/pci0000:00/0000:00:13.2/usb2/2-4"
Feb 02 09:55:33 Megatron mtp-probe[911]: bus: 2, device: 4 was not an MTP device
Feb 02 09:55:33 Megatron kernel: usb-storage 2-4:1.0: USB Mass Storage device detected
Feb 02 09:55:33 Megatron kernel: scsi12 : usb-storage 2-4:1.0
Feb 02 09:55:33 Megatron kernel: usbcore: registered new interface driver usb-storage
Feb 02 09:55:34 Megatron kernel: scsi 12:0:0:0: Direct-Access WD My Passport 07A8 1049 PQ: 0 ANSI: 6
Feb 02 09:55:34 Megatron kernel: scsi 12:0:0:1: Enclosure WD SES Device 1049 PQ: 0 ANSI: 6
Feb 02 09:55:34 Megatron kernel: sd 12:0:0:0: [sde] Spinning up disk...
Feb 02 09:56:04 Megatron systemd-udevd[186]: worker [926] /devices/pci0000:00/0000:00:13.2/usb2/2-4/2-4:1.0/host12/target12:0:0/12:0:0:1 timeout; kill it
Feb 02 09:56:04 Megatron systemd-udevd[186]: seq 1876 '/devices/pci0000:00/0000:00:13.2/usb2/2-4/2-4:1.0/host12/target12:0:0/12:0:0:1' killed
Feb 02 09:56:06 Megatron kernel: usb 2-4: reset high-speed USB device number 4 using ehci-pci
Feb 02 09:56:06 Megatron kernel: .ready
Feb 02 09:56:06 Megatron kernel: sd 12:0:0:0: [sde] 1953458176 512-byte logical blocks: (1.00 TB/931 GiB)
Feb 02 09:56:06 Megatron kernel: sd 12:0:0:0: [sde] Write Protect is off
Feb 02 09:56:06 Megatron kernel: sd 12:0:0:0: [sde] Mode Sense: 53 00 10 08
Feb 02 09:56:06 Megatron kernel: sd 12:0:0:0: [sde] No Caching mode page found
Feb 02 09:56:06 Megatron kernel: sd 12:0:0:0: [sde] Assuming drive cache: write through
Feb 02 09:56:06 Megatron kernel: sd 12:0:0:0: [sde] No Caching mode page found
Feb 02 09:56:06 Megatron kernel: sd 12:0:0:0: [sde] Assuming drive cache: write through
Feb 02 09:56:06 Megatron kernel: sde: sde1 sde2
Feb 02 09:56:06 Megatron kernel: ses 12:0:0:1: Attached Enclosure device
Feb 02 09:56:06 Megatron systemd-udevd[186]: worker [926] terminated by signal 9 (Killed)
Feb 02 09:56:06 Megatron kernel: sd 12:0:0:0: [sde] No Caching mode page found
Feb 02 09:56:06 Megatron kernel: sd 12:0:0:0: [sde] Assuming drive cache: write through
Feb 02 09:56:06 Megatron kernel: sd 12:0:0:0: [sde] Attached SCSI disk
Feb 02 09:56:07 Megatron org.gtk.Private.UDisks2VolumeMonitor[592]: ### debug: emit_signal: 0x175a210
Feb 02 09:56:37 Megatron systemd-udevd[186]: worker [908] /devices/pci0000:00/0000:00:13.2/usb2/2-4/2-4:1.0/host12/target12:0:0/12:0:0:0/block/sde/sde1 timeout; kill it
Feb 02 09:56:37 Megatron systemd-udevd[186]: seq 1884 '/devices/pci0000:00/0000:00:13.2/usb2/2-4/2-4:1.0/host12/target12:0:0/12:0:0:0/block/sde/sde1' killed
Feb 02 09:56:37 Megatron systemd-udevd[186]: worker [928] /devices/pci0000:00/0000:00:13.2/usb2/2-4/2-4:1.0/host12/target12:0:0/12:0:0:0/block/sde/sde2 timeout; kill it
Feb 02 09:56:37 Megatron systemd-udevd[186]: seq 1885 '/devices/pci0000:00/0000:00:13.2/usb2/2-4/2-4:1.0/host12/target12:0:0/12:0:0:0/block/sde/sde2' killed
Feb 02 09:56:37 Megatron kernel: usb 2-4: reset high-speed USB device number 4 using ehci-pci
Feb 02 09:56:38 Megatron systemd-udevd[186]: worker [908] terminated by signal 9 (Killed)
Feb 02 09:56:38 Megatron systemd-udevd[186]: worker [928] terminated by signal 9 (Killed)
Something also worth knowing : the drive is know for being a heavy power drain on the usb 2.0 port (it does not have an external power connection and gets its power only via usb) . So I bought a specific cable with 3.0 at one end and 2 usb 2.0 at the other end : one for transferring data and one for power.

XSAN Read & Write Speed Low

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