Defective disk performance

Similar Questions

• The disk performance hard OS ESX influences the performance of ESX somehow?

  Hello

  Does the OS ESX (e.g. hard disk performance

  between SATA and SAS) affect the performance of the ESX somehow?

  (To clarify, I wonder about the hard drive that ESX is

  installed, not the hard drive that are the VMFS volumes).

  This information will help us determine if the benefit of

  faster disks to the ESX operating system outweigh the additional costs.

  Thank you!

  John

  Welcome to the Forums - there are two parts that the local disk speed will affect perfomance - during the startup of the ESX host, it will delay the start of the server ESX - the other begins as others have said if you do not set / the effective Service Console - what needs to be done to ensure your service console is configured approriately.

  1. Sevrice console the maximum value of 800 MB memory - which is then installing ESX you set space swap to 2 x 800 or 1.6 - GB

  2. When accessing your virtual machines using RDP or SSH, this will reduce the load on the service console

  3. Minimize running them something extra in the Sevrice Console-

  If you find this or any other answer useful please consider awarding points marking the answer correct or useful

• HP 14-r025tx: what is the maximum size of hard drive I can replace my default one? & other hard disk performance issue

  My default hard disk is almost full and I plan to update. What is the maximum size that this model could overcome? Very well is 2-3 to?

  Another question.

  I replaced my optical drive to a box with a 250 GB SSD HARD drive inside. I installed my new operating system here, and makes the default boot drive. The default value of HARD drive that comes with the laptop is my backup drive. This is configured by okay?

  or

  Do I have to put my SSD on the default HARD drive space and put my 2 to/3 TB harddrive on the caddy for maximum performance?

  Hello

  1. in theory, you can get 2 TB or TB but 1 TB has better peformance.

  2. you cannot boot from the caddy. My suggestion: use for normal Bay and 2 TB SSDS in the caddy. You both what you want.

  3. as (2) above.

  Kind regards.

• Acceptable DELL PS4100xv and SAN HQ disk performance

  Hello

  I have a Dell PS4100xv with 12 x 600 GB 15K SAS drives configured in RAID 6.

  3 three R420 servers are connected via 2 x Power Connect 6224 (bunk).

  I'm under ESXi 5.1 U1 with a mixture of SQL virtual computers, file servers, and Proxy servers.

  What are the acceptable values for a healthy EQL in terms of latency, disk queue, Ops ARE / s and etc?

  Just recently, I transferred a virtual machine to the PS4100XV. The virtual machine has a very slow behavior when using the EQL Dell. This is SQL Server. You have a lot of users complaining about the sluggish behavior.

  I need to determine if I have a problem on my PS4100xv in terms of performance before you start to troubleshoot the VMs and ESXi hosts.

  These are values measured HQ SAN during the last eight hours.

  If I got this right that my own analysis

  • The disk queue is ok, since its constantly @ 0. EQL can handle the load and nothing is pending.

  • IOPS / s is ok, because the base on the RAID my table evaluator should support 1500 IOPs. Current reading is 742 IOPS / s only.

  • To write latency is ok because he is 13 Ms and does not even approach 20 ms.

  • Latency of reading, I have a problem? It fits above 20 Ms flat around 25 ms to 40 ms.      But not more than is not 40 ms.
  • For the size of the IO rate & IO, I don't know if that's a good indicator. What are the acceptable values?

  Disk queue depth:	zero (0), the graph shows his dish to zero.
  Average READ IOPS:	625
  Average WRITE IOPS / s:	117
  Total average IOPS / s	742
  Latency average reading	30 ms (ms 20 to 40 ms)
  Average latency of writing	13 ms (straight line @ 13 ms)
  Weighted average	28 ms
  E/s average rate readings	26.41 MB/sec
  Writing of average IO	2.26 Mbps
  Total	28.67 MB/s
  Average size of READ i/o	43,30 KB
  Average size of i/o WRITE	19.91 KB
  Weighted average	39.62 KB

  There is no retransmission of packets and the network usage is only 3%.

  Would really appreciate the input and recommendations.

  What are the acceptable values for a healthy EQL in terms of latency and IOPS / s, queue disk, etc.?

  Thank you

  Paul

  I strongly suggest you open a record of support on any show of related issues.  However, with ESXi especially when I see low i/o + latency, the first thing I usually find is that DelayedACK is enabled.  Sometimes, large receive the unloading (LRO) can do that as well.   Another common problem is not optimize MPIO.  And not not not using Round Robin with 3 IOs by path from the default value of 1000 IOs.  Or if you have a company or business license + installation Dell EQL MEM.   Sharing also several VMDK with one card virtual SCSI inside each virtual machine is another cause of latency.   Each virtual machine can have up to four 4 virtual SCSI adapters.  With a single adapter, single VMDK (disc) can be active at a given time.  If an operation of e/s on the "C:" drive will block your SQL disks.

  This link is a PDF that will show you how to fix common incorrect configurations with ESXi + EQL.

  en.Community.Dell.com/.../20434601.aspx

  HOWEVER.  If you find delayed ACK is enabled the process described here probably won't be enough to solve the current connections.   With the mode node maint.  Remove the address of discovery EQL, remove the "Static discovery" entries EQL volumes.   Restart the node.   Add discovery addresses but NOT yet rescan.  Make sure that login_timeout is 60 years old, DelayedACK is disabled.   Then make the new analysis.

  Kind regards

• Ultimate Vista x 64 defective disk

  Vista ultimate x 64 disc that I began to separate between the top and the bottom of the layers of plastic around the inner ring. I rarely used the system repair disc (maybe once or twice in the lifetime of the disc). I am extremely careful with my records, in handling and storage. There has never been a problem with all the other drives I've owned or used from any manufacturer, and I am sure that it is the result of a bad seal in the disc manufacturing process. The layers of the disc should not be separate, and I fear that if the disk is necessary once again he may not make it through the next use. As Vista Ultimate was the retail cost of $399 at the time I bought it, the idea of spending more for a copy of the non-defective replace it seems an exorbitant expense given the number of times this record has been used. Is it possible to get a CD-ROM of replacement due to faulty craftsmanship of the original? An Exchange would also perfectly fine with me...

  http://support.Microsoft.com/default.aspx/KB/326246

  'How to replace Microsoft software or hardware, order service packs and upgrades, and replace product manuals'

  See you soon. Mick Murphy - Microsoft partner

• HP ProLiant ML310e with ESXI 6.0 slow disk performance

  Just a question if this issue was already addressed with a new driver?

  Performance is really bad HARD disk access. Less then USB2.

  Thank you

  Rui

  Nope. Downgrade from version 088 is still necessary.

• 2003 slow vs Fast - problem of disk Performance 2008

  A deal has been working for some time.

  My 5.0 ESXi hosts approximately 80 virtual to mixed accommodation 2003/2008 guest o/s mainly located on FC 15 k lun.

  By chance I discovered hosts 2003 seems unable to use the underlying disk system when we look at transfer rates inside the guest, as well as by the VM performance charts.

  Win2003 peaks at 30-50 mb/s, where guests win2008 deliver double only 100-120 MB / s when maxing out.

  Use it on Win 2003 recommended LSI Logic parallel and I even tried to use the controller SCSI Paravirtual, but who has not pushed my transfers either.

  Next thing I tried was formatting a drive (re-alignment) through 2008, then by attaching to the Server 2003, but this did not improve speeds either.

  Wonder what could be the cause.

  The photo shows all.

  Same o/s of VM - same LUN - host various comments

  OK - driver SCSI Paravirtual should not be underestimated. Reading performance when returning to parallel LSI is half that of PVSCSI.

  

  If the performance gains are massive on 2003 default LSI SCSI parallel.

  2008 doesn't seem to have performance problems because it uses SCSI SAS LSI.

• Question about disk performancy system

  Hello.

  My situation: I have a virtual machine that contains the server to Oracle 10 g. It has an Intel Quad processor, 4 GB of RAM and SERIAL ATA drive. We have problems of serious performance with Oracle. Using statspack I found that the TOP 5 blocks contains sequential read and write parallel events with high expectations. Also, we run some benchmarks of performance, and they prove my suspicion: this disc is less than my home PC. Looks like we need to change our system of virtual disk. Material on which we run Vmware servers have the disk RAID offers great performance with system.

  But! How do I system virtual disk speedup? I can't find anything useful in the preferences of virtual server...

  Sorry for the stupid question if this is...

  Thank you!

  VMware Server was out of use for a long time. He never was not intended as a platform for production software and would not have been supported by VMware or Oracle as a platform for Oracle databases. The reasons for my being exactly the issues you see.

  Your material seems he could suport ESXi running. http://VMware.com/go/ESXi I would check the HCL to make sure that your hardware is supported, including the network and disk controllers. http://VMware.com/go/HCL

  ESXi is supported by VMware for running Oracle

  http://www.VMware.com/resources/TechResources/10101

• SAN Disk Performance size

  We are looking to add an expansion Bay to our IBM DS3400 SAN.  Fully complete bays 12 disk with 300 GB SAS drives or SAS of 600GO drives and wondered what would be the difference in performance, if any, of the differences in read/write because of the size of the readers.    There is probably a hot spare, leaving 11 discs as a RAID5 configuration.

  Any input or thoughts would help considerably, thank you

  -Kyle

  «"RParker wrote: I guess I was mistaken, everything CAN be virtualized"»

  Hey Kyle,.

  There was a discussion way back to what was good enough.

  Good luck!

• A defective disk cloning

  I have a disc that will not go up. If I have clone with a software that can be read and can clone it may ruin a second drive that maybe isn't able to mount too?

  THX

  Hi corinne

  More information would be useful.

  It is an external drive, I guess. USB/crush?

  How it is formatted? OS X journaled? Master Boot Record? NTFS?

  What happens when you plug it in? Disk utility launch and say "this disc is unrecognizable...?

  How do you intend to "Clone It? Is that in a Bay 2 dock with clone capabilities?

  Other computers recognize the drive?

  Once we know more, then we can go from there

  Hope this helps, Greg

• Presario s4490uk: boot and hard disk performance

  It is an old machine, but generally suitable for use with a Pentium 4 running at 2.8 GHz and 2 GB ram max. The 120 GB hard drive is at capacity and in particular, the startup is very slow.

  I'm not really interested in buying a replacement but rather looking for updates that will give me a recognizable performance improvement.

  For example, is it possible to replace the hard drive with an SSD and it will deliver no improvement in performance. Similarly, a hybrid Ssd (at much lower cost) would deliver all the benefits.

  Had a quick look at site Crucial however it has not offered an ssd for this model of office.

  Also, if I can get an improvement in the performance of the equipment, would it be possible to update the operating system windows 10?

  Very grateful for any advice!

  You are welcome!

  On the SSD, what looks like a very specific procedure, so I think it will be a good idea to contact Crucial support on this issue. They will be able to say with certainty whether it will work or not.

  Regarding the RAM, I suggest you stick to HP recommendations, because even if you decide to run the two modules on the same machine as a whole, it must default to the lowest speed (i.e. in this case the PC2700). However, if you replace the PC2700 PC3200, you will get a slight speed increase, but I can tell you with certainty how it will be, and if it is noticeable at all.

• cost vs disk performance hard

  Computer that has the best drive hard 80 GB
  (vs cost performance) and which is their production?

  I'm sorry, but we cannot recommend some brands of equipment in these Forums.

  Here is the Vista operating system Help Forums.

  See you soon.

  Mick Murphy - Microsoft partner

• ESXI 5.1 bad disk performance

  I have two servers.  A Dell r.620 with a h710p running in raid 5 - ESXI 5.1, 799733

  When I use Veeam to migrate a virtual server to a former Dell 2950 to the r.620 I get around 50Mbs.

  Then I have a Dell 630 with H330 RAID 5 - ESXI 5.1, 2000251

  When I use Veeam to migrate a virtual server of the same 2950 to the R630 I get 9 transfer of Mbs.

  Can someone tell me if it's really because has 620 a controller card raid of dough with 1GIG hiding on that?

  It would be really 5 times faster?

  Both have the same NIC.

  Thank you

  J

  Yes, the battery or the sustained write flash cache makes a huge difference (often 10 X or more) for most RAID controllers. The controller cache option writeback mode, while a controller without this option works in the hollows and write mode. Writeback mode acknowledges the write operation as soon as the data is stored in the cache. For the write-through mode recognition requires that the data has already been written in the disks.

  André

• [ESXi] The used hard disk performance

  I know that the location of storage for virtual machines affect performance,

  I wonder if quality hard drive I use to install ESXi (I would welcome my VMS on different hard drives in RAID configurations) makes a difference in how to perform virtual machines?

  ESXi is running in memory and rights back config changes every 5 minutes from what I can remember. Make sure you just config your syslog space and scratch.

• Script to find the 'top 10' VMs consuming disk performance?

  We're troubleshooting an issue of storage and I'm looking for a better way to find virtual machines that consume disk peformance.  If I had a wish list, the script would be the 'top 10' VMs with the highest disk throughput and the e/s in the last 24 hours.

  Such a script exist?  Any help would be greatly appreciated.

  You can try the following one liner

  Get-VM | Select Name,
       @{N="AverageIO";
         E={($_ | Get-Stat -Stat disk.usage.average -Start (Get-Date).adddays(-1) | Measure-Object -Average -Property Value).Average}} | `
       Sort-Object -Property AverageIO -Descending | Select -First 10
  

  This example uses the metric of disk.usage.average but you can easily use any of the other measures related to the disc.

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