Sunset, also known as sundown, is the daily disappearance of the Sun below the horizon due to Earth's rotation.As viewed from the Equator, the equinox Sun sets exactly due west in both Spring and Autumn. As viewed from the middle latitudes, the local summer Sun sets to the northwest for the Northern Hemisphere, but to the southwest for the Southern Hemisphere.
-->The Lsv2-series features high throughput, low latency, directly mapped local NVMe storage running on the AMD EPYCTM 7551 processor with an all core boost of 2.55GHz and a max boost of 3.0GHz. The Lsv2-series VMs come in sizes from 8 to 80 vCPU in a simultaneous multi-threading configuration. There is 8 GiB of memory per vCPU, and one 1.92TB NVMe SSD M.2 device per 8 vCPUs, with up to 19.2TB (10x1.92TB) available on the L80s v2.
Note
Random Local Disk Example
The Lsv2-series VMs are optimized to use the local disk on the node attached directly to the VM rather than using durable data disks. This allows for greater IOPs / throughput for your workloads. The Lsv2 and Ls-series do not support the creation of a local cache to increase the IOPs achievable by durable data disks.
You may not be able to see the Z: drive in the System Protection tab. But it still appears in the drive list as a Local drive. If you see in the above image, you can observe that there is an unknown local disk present in the local drive list. This is due to the partitioning of the drives. I don't have a local disk E. I have a 250GB ssd and a 1TB hdd, yet I keep getting a popup saying that my local disk E is running low on space and can be cleaned. When I follow through with this, it lists and but both are 0 bytes. Since a few days ago a new drive arrived with 450mb space. I googled about it, and it seems harmless. But it keeps coming with a low on space warning (it has 42,7mb free).
The high throughput and IOPs of the local disk makes the Lsv2-series VMs ideal for NoSQL stores such as Apache Cassandra and MongoDB which replicate data across multiple VMs to achieve persistence in the event of the failure of a single VM.
To learn more, see Optimize performance on the Lsv2-series virtual machines for Windows or Linux. Fallout 3 map alien crash site.
ACU: 150-175
Bursting: Supported
Premium Storage: Supported
Premium Storage caching: Not Supported
Live Migration: Not Supported
Memory Preserving Updates: Not Supported
Size | vCPU | Memory (GiB) | Temp disk1 (GiB) | NVMe Disks2 | NVMe Disk throughput3 (Read IOPS/MBps) | Uncached data disk throughput (IOPs/MBps)4 | Max burst uncached data disk throughput (IOPs/MBps)5 | Max Data Disks | Max NICs | Expected network bandwidth (Mbps) |
---|---|---|---|---|---|---|---|---|---|---|
Standard_L8s_v2 | 8 | 64 | 80 | 1x1.92 TB | 400000/2000 | 8000/160 | 8000/1280 | 16 | 2 | 3200 |
Standard_L16s_v2 | 16 | 128 | 160 | 2x1.92 TB | 800000/4000 | 16000/320 | 16000/1280 | 32 | 4 | 6400 |
Standard_L32s_v2 | 32 | 256 | 320 | 4x1.92 TB | 1.5M/8000 | 32000/640 | 32000/1280 | 32 | 8 | 12800 |
Standard_L48s_v2 | 48 | 384 | 480 | 6x1.92 TB | 2.2M/14000 | 48000/960 | 48000/2000 | 32 | 8 | 16000+ |
Standard_L64s_v2 | 64 | 512 | 640 | 8x1.92 TB | 2.9M/16000 | 64000/1280 | 64000/2000 | 32 | 8 | 16000+ |
Standard_L80s_v26 | 80 | 640 | 800 | 10x1.92TB | 3.8M/20000 | 80000/1400 | 80000/2000 | 32 | 8 | 16000+ |
1 Lsv2-series VMs have a standard SCSI based temp resource disk for OS paging/swap file use (D: on Windows, /dev/sdb on Linux). This disk provides 80 GiB of storage, 4,000 IOPS, and 80 MBps transfer rate for every 8 vCPUs (e.g. Standard_L80s_v2 provides 800 GiB at 40,000 IOPS and 800 MBPS). This ensures the NVMe drives can be fully dedicated to application use. This disk is Ephemeral, and all data will be lost on stop/deallocate.
2 Local NVMe Disks are ephemeral, data will be lost on these disks if you stop/deallocate your VM.
3 Hyper-V NVMe Direct technology provides unthrottled access to local NVMe drives mapped securely into the guest VM space. Achieving maximum performance requires using either the latest WS2019 build or Ubuntu 18.04 or 16.04 from the Azure Marketplace. Write performance varies based on IO size, drive load, and capacity utilization.
4 Lsv2-series VMs do not provide host cache for data disk as it does not benefit the Lsv2 workloads.
5 Lsv2-series VMs can burst their disk performance for up to 30 minutes at a time.
6 VMs with more than 64 vCPUs require one of these supported guest operating systems:
![Examples Examples](https://images.homedepot-static.com/productImages/34c1c3e5-135d-4154-99fc-5facba6b43b1/svn/diablo-power-sander-accessories-dcd050320h50g-64_1000.jpg)
- Windows Server 2016 or later
- Ubuntu 16.04 LTS or later, with Azure tuned kernel (4.15 kernel or later)
- SLES 12 SP2 or later
- RHEL or CentOS version 6.7 through 6.10, with Microsoft-provided LIS package 4.3.1 (or later) installed
- RHEL or CentOS version 7.3, with Microsoft-provided LIS package 4.2.1 (or later) installed
- RHEL or CentOS version 7.6 or later
- Oracle Linux with UEK4 or later
- Debian 9 with the backports kernel, Debian 10 or later
- CoreOS with a 4.14 kernel or later
Size table definitions
- Storage capacity is shown in units of GiB or 1024^3 bytes. When comparing disks measured in GB (1000^3 bytes) to disks measured in GiB (1024^3) remember that capacity numbers given in GiB may appear smaller. For example, 1023 GiB = 1098.4 GB
- Disk throughput is measured in input/output operations per second (IOPS) and MBps where MBps = 10^6 bytes/sec.
- If you want to get the best performance for your VMs, you should limit the number of data disks to 2 disks per vCPU.
- Expected network bandwidth is the maximum aggregated bandwidth allocated per VM type across all NICs, for all destinations. Upper limits are not guaranteed, but are intended to provide guidance for selecting the right VM type for the intended application. Actual network performance will depend on a variety of factors including network congestion, application loads, and network settings. For information on optimizing network throughput, see Optimizing network throughput for Windows and Linux. To achieve the expected network performance on Linux or Windows, it may be necessary to select a specific version or optimize your VM. For more information, see How to reliably test for virtual machine throughput.
Other sizes and information
Pricing Calculator: Pricing Calculator
More information on Disks Types : Disk Types
Next steps
Learn more about how Azure compute units (ACU) can help you compare compute performance across Azure SKUs.
Summary
If your hard drive disappeared or failed to show up in Windows 10/8/7, don't worry. This page will show you how to effectively fix hard drive disappeared error in Windows Explorer/Disk Management. If hard drive disappeared issue fixed but data lost, use EaseUS Data Recovery Wizard to recover lost data from the hard drive.
Hard drive disappeared after Windows 10 update
'Does anyone know how to make the disappeared hard drive to show up again in Windows 10? My computer received the latest Windows 10 update last night, and it automatically installed the update. The problem is that I could not see the second hard drive in File Explorer after the computer restarted. I rebooted the computer but the hard drive still disappeared. Is there a way that can help me to make the disappeared hard drive show up in Windows 10?'
When the hard drive disappeared on Windows computer, you'll not be able to visit and access the saved data. And this will result in data loss, storage space shrinking issue and other more problems. So what can you do when the hard drive disappeared on your PC? If you are facing such a problem, relax! Effective methods are available here to help now.
If it's SSD not showing up in Windows 10, go to the other page to find solutions. In addition, some of the linked page's solutions are also applicable to the HDD disappeared issue, like rescan, initialize, and check hard disk errors..
Workable Solutions | Step-by-step Troubleshooting |
---|---|
Case 1. Hard drive disappeared in Explorer | Method 1. Run hardware and device troubleshooter to fix the drive issue..Full steps Method 2. Perform partition recovery..Full steps |
Case 2. Hard drive disappeared in Disk Management | Method 1. Update device driver..Full steps Method 2. Change the drive letter..Full steps |
Quick fix hard drive disappeared issue in Windows 10
When hard drive failed to show up on Windows PC, you can try to connect your hard drive with a different USB port to see if it helps or not.
If not, you can also try to connect the hard drive to another computer to check if the issue replicates or not.
If the problem gets solved, you may need to change a new USB cable line or hard drive cable.
If the problem still exists, don't worry. Just follow the next offered methods to fix hard drive disappeared in Windows 10 error now.
Fix hard drive disappeared in File Explorer error
When you open File Explorer, and you cannot view the hard drive partition there, like D drive, E drive, and other data partitions, you can try the next two methods for help.
Method 1. Run hardware and device troubleshooter to fix hard drive disappeared issue
1. Press 'Windows + R' keys.
2. Type 'control' and press enter to open the control panel.
3. Type 'troubleshooting' in the control panel search box and open it.
4. Click 'view all' on the left pane.
5. Run the hardware and devices troubleshooter and follow the on-screen instructions.
2. Type 'control' and press enter to open the control panel.
3. Type 'troubleshooting' in the control panel search box and open it.
4. Click 'view all' on the left pane.
5. Run the hardware and devices troubleshooter and follow the on-screen instructions.
Method 2. Perform partition recovery with EaseUS Partition Recovery
Windows update deletes a hard drive partition, or you accidentally perform 'Delete Volume..' in Disk Management, the hard drive will be in 'unallocated space' state. Windows 10 will not recognize a hard drive partition showing up as unallocated. You can create a new partition on the unallocated drive to make it show up again. Creating a new hard drive would help Windows system detects the drive as new, but the hard drive data is gone forever.
There are two ways to protect hard drive data from disappearing: [1] Directly perform a whole partition recovery instead of creating a new one; [2] Recover hard drive data after creating a new drive. Both ways are meant to rescue data on a disappeared hard hard drive storage, but the former method is more preferred. EaseUS Partition Recovery is able to recover the entire hard drive along with data on it.
Go to the product page and download EaseUS Partition Recovery, and follow the guide to show up a disappeared hard drive as well as data in Windows 10.
Random Local Disk Editor
Step 1: Run EaseUS Partition Recovery on your PC.
Select the disk or device where you lost partition(s), click 'Scan' to continue.
Step 2: Wait for the scanning process to complete.
Let the program scan selected disk and find the lost partition(s).
Step 3: Preview and restore lost partition(s).
Double-click on the partition which is marked as 'Lost' with 'Good' recoverability.
Preview the content of the lost partition. Click 'OK' and click 'Proceed' to start restoring the lost partition.
Step 4: Click 'Recover Now' to finish the partition recovery process.
Note: If the program warns you that there is a conflict, back up the listed partition with essential data to an external hard drive first. Then execute the final operation to restore your lost partition.
![Error Error](https://images.homedepot-static.com/productImages/7d3b954b-1d85-4fe3-a1cc-90991643b19e/svn/porter-cable-disc-orbital-sanders-382-64_1000.jpg)
If you choose to create a new partition on unallocated space and need data recovery afterward, then choose EaseUS Data Recovery Wizard to recover hard drive data. Being different from Partition Recovery software, using Data Recovery Wizard won't help recover a disappeared hard drive but only data on it.
Fix hard drive disappeared/not showing up in Disk Management
If the hard drive disappeared or failed to show up in Disk Management, the next two steps can easily help you out.
Step 1. Update device drivers in Windows 10
1. Right-click on the Start button and select 'Device Manager'.
2. Expand one of the categories to find the name of your device, then right-click it, and select 'Update Driver'.
3. Select 'Search automatically for updated driver software'.
If Windows doesn't find a new driver, you can try looking for one on the device manufacturer's website and follow their instructions. Otherwise, you can try to reinstall the driver by doing like this:
1. Open Device Manager, right-click the name of the device and this time select 'Uninstall device'.
2. Restart your PC and Windows will attempt to reinstall the driver.
Step 2. Change drive letter of disappeared hard drive
1. Press 'Windows + R' keys to bring up the Run dialog.
2. Type'diskmgmt.msc' and press enter to open disk management.
3. The disappeared hard drive can be detected now, right-click on it and select 'change drive letter and paths'.
4. Click 'change' and assign a different drive letter.
5. Save the changes, restart the computer and check again.