Frequently Asked Questions

歡迎來到我們的常見問題(FAQ)頁面,這是一個提供清晰解答的地方,讓您更深入了解我們創新產品SupremeRAID™。以下是一些常見的問題與解答,希望幫助您更快速理解我們的技術和服務。如果您有其他問題,請務必使用下方的聯絡表單提交給我們,我們將儘速為您提供服務。

General

What NVIDIA models do you use for the GPUs?

A brief comparison is provided below.

 SR-1001SR-1000SR-1010
NVIDIA ModelT400T1000A2000
LengthX16 PCIeX16 PCIeX16 PCIe
WidthSingleSingleDual slot
PCIe GenPCIe3PCIe3PCIe4
SSDs Supported83232
RAID LevelsRAID0,1,5,6,10RAID0, 1, 5, 6, 10RAID0, 1, 5, 6, 10
Max Drive GroupsLinux: 8
Windows: 4
Linux: 8
Windows: 4
Linux: 8
Windows: 4
Max Virtual DrivesLinux: 1023
Windows: 8
Linux: 1023
Windows: 8
Linux: 1023
Windows: 8
PlatformsAMD, Intel, ARM (Ubuntu)AMD, Intel, ARM (Ubuntu)AMD, Intel, ARM (Ubuntu)

Can we use our own NVIDIA GPUs and purchase SupremeRAID™ software from Graid Technology?

The SupremeRAID™ software and NVIDIA GPU must be purchased from Graid Technology. For large global OEM agreements, we will consider alternative arrangements. To learn more about the SupremeRAID™ SE bring-your-own-GPU beta program or to request access, visit https://beta.graidtech.com.

Where can I purchase SupremeRAID™?

Through extensive testing and research, Graid Technology has developed relationships with trusted partners, OEMs, distributors, and resellers across the globe. We also have agreements with server manufacturers, such as Supermicro and GIGABYTE, who sell our solutions. A full list is available here: www.graidtech.com/partners

How are Graid volumes configured and seen by the OS?

When the SupremeRAID™ driver has been installed and licensed the individual drives are still visible and can be used by the OS as individual drives. To create RAID-protected volume with SupremeRAID™ you follow 3 steps.

Step 1:
Create Graid “Physical Drives (PD)”. This is where you Instruct Graid to take ownership of selected Physical drives, the drives then disappear and are not visible by the OS. In windows they disappear from Disk Management and in Linux they are now not visible with lsblk.

Step 2:
Create Graid “Drive Group (DG)” – Instruct Graid to create a RAID group out of a select number of those PD’s, this is when you specify the RAID level. i.e RAID5, 6 etc.

Step 3:
Create Graid Virtual Drive (VD) – Instruct Graid to create one or more “Virtual Drive (VD)”. Each Virtual drive is visible to the OS as a volume. This can now be seen in Windows disk manager or when typing lsblk in Linux.

Note:
The above process and commands are identical for Windows and Linux configuration.

Do you support NVMe-oF?

SupremeRAID™ supports using NVMe-oF in two ways, as shown below. In the right-hand configuration, “Remote RAID Volume,” you would typically have multiple servers at the top, all accessing different volumes presented from the Storage server at the bottom.

Installation, Configuration & Management

What software dependencies are there?

For Windows installations, the dependencies are Visual C++ and the NVIDIA GPU driver. There are several software dependencies for Linux, including automake, dkms, gcc, make, tar, and sqlite-libs. Graid Technology has provided a pre-installation script that automates the installation of all these dependencies.

Does SupremeRAID™ use any custom firmware or drivers for the NVIDIA GPUs?

No custom firmware or drivers are required for the NVIDIA GPUs we use. The drivers we use are freely available from NVIDIA.

How do I apply the license key?

Once the SupremeRAID™ GPU and drivers have been installed, the license key must be applied. The license key is tied to the serial number of the GPU therefore any replacement GPU will also be accompanied by a new license key. Some commands for managing are:
$ sudo Graidctl apply license [LICENSE_KEY]

Does Graid support the boot drive?

The boot device is typically managed by SW Raid 1 on M.2 drives or by using other software/lower cost RAID controllers. After installing the SupremeRAID™ software you can import and control an MD bootable NVMe RAID. This feature makes it easy to swap drives if a bootable drive malfunctions.

Can I access detailed SSD drive information with third-party tools like Solidigm Storage Tool?

To check the SMART information for the gpd device, use the NVMe smart-log or smartctl command detailed in the manual. To avoid data loss, please do not use 3rd party tools to manage the drives. Tools such as Solidigm Storage Tool on Windows should not be used when SupremeRAID™ is managing the drives.

Do you have a GUI?

A GUI is available in our 1.6 Linux driver and is currently on the roadmap for the SupremeRAID™ Windows driver.

How long does it take to create a RAID volume and for it to be useable?

When using the native Windows RAID5, for example, you may have seen that it can take 10-30 hours to create a RAID volume before it becomes usable. When using SupremeRAID™ RAID5 with Windows, however, the volume is made available immediately for use. The same is true when using SupremeRAID™ with Linux.

Can we be alerted to drive failures?

Yes, we have provided SMTP integration so that alerts can be received by email. These can be filtered by severity, i.e., “Warning,” or “Error” of “info.” The change in the status of Physical drives, Drive Groups, and Virtual drives can be included. This is available for both Windows and Linux drivers.

Recovery & Resiliency

What is the process for replacing a failed SupremeRAID™ GPU?

The process to replace a SupremeRAID™ GPU is detailed in the section of the user guide called “Replacing a SupremeRAID™ Card”. Before doing this, please ensure you have the replacement license key to hand as each SupremeRAID™ GPU requires a unique license key. The user guides for both Linux and Windows can be found here: https://www.graidtech.com/download-graid-supremeraid-user-guide/

Is it possible to have two SupremeRAID™ cards in the same server for High Availability?

Yes, this is possible with the Linux driver. It is an active/active configuration where each SSD is assigned to a primary SupremeRAID™ controller. If the primary SupremeRAID™ controller fails, all SSDs will seamlessly be managed by the remaining operational SupremeRAID™ controller. There is no need to set the preferred controller manually while creating a drive group because SupremeRAID™ automatically selects the optimal controller.

Can I transfer drives and data between servers?

Physically moving the SSD drives from one server and inserting them into another server is simple and is an operational requirement by some of our customers. The data and the SupremeRAID™ configuration details are stored on the drives and are immediately useable when the destination server is booted, provided the SupremeRAID™ software is installed, licensed and active.

Data Integrity

SupremeRAID™ 如何防止磁碟上的意外數據覆蓋?

Once SupremeRAID™ takes control of the NVMe drives, the original NVMe block devices disappear from the system. This design feature prevents users from inadvertently corrupting or overwriting data, thereby significantly enhancing data reliability and preserving data integrity on the SSDs.

SupremeRAID™ 如何防止靜態資料損壞?

就像其他RAID解決方案一樣,SupremeRAID™提供同步一致的後台檢查功能,以確保數據長期的完整性。此過程有助於及早檢測和糾正靜默數據損壞。

Does SupremeRAID™ provide write-hole protection? How does it guard against the write-hole problem?

Yes, SupremeRAID™ provides write-hole protection as most RAID solutions do in write-through mode (i.e. without data caching), although it depends on the re-synchronization operation to ensure data and parity consistency after the system experiences an unexpected shutdown. Given that SupremeRAID™ doesn’t use any memory cache to enhance performance, we employ this same mechanism to guarantee data consistency. The distributed journalling feature developed by SupremeRAID™ adds further resiliency and reliability.

What is checksum verification on read I/O, and do I need it?

每個讀取 I/O 上的校驗和驗證是某些文件系統用來檢測檔損壞的功能,這可能是由於通常與硬碟關聯的靜默位腐爛而發生的。然而,重要的是要記住,RAID 的主要功能是提供磁碟冗餘並保持服務連續性。大多數現代RAID解決方案(包括傳統的硬體RAID卡)通常不包含此功能。

如果我要求對讀取操作進行校驗和驗證,會產生什麼影響?

如果您需要對讀取操作進行校驗和驗證,您可以將 SupremeRAID™ 與 ZFS 或 Btrfs 檔案系統結合使用。這些文件系統提供全面的功能,包括校驗和驗證,而 SupremeRAID™ 可以將 RAID 計算和 I/O 操作卸載到 GPU,成為功能強大且功能豐富的儲存解決方案。

How long does consistency checking take?

10GB/sec would be the suggested speed to assume, although it depends on the read capabilities of the drives themselves and system resources. A 10TB drive group would, therefore, take roughly 17 minutes.

How often should consistency checking occur?

We suggest a monthly check as a good option.

Are there any other consistency checking best practices I should be aware of?

Use the “auto fix” option, rather then “stop on error”.

Performance

How can SupremeRAID™ throughput be higher than the maximum capability of the x16 PCIe slot it is on?

SupremeRAID™’s unique architecture allows NVMe SSDs to be directly connected to the CPU. The GPU handles most of the operational control, but data transfer occurs directly between the NVMe SSDs and the host memory. This direct connection allows data to be transferred at full PCIe bandwidth of every NVMe SSDs, thus maximizing performance.

Why are buffering and caching detrimental to NVMe SSD performance?

Buffering and caching are techniques that manage temporary data storage. While these processes introduce overhead and extra latency, they are quite beneficial for traditional hard disk drives due to the substantial latency difference between the hard disk and the host memory. However, when dealing with high-speed NVMe SSDs, the additional latency can counteract the benefits of caching, potentially leading to performance degradation and a potential bottleneck.

Resources & Support

Where can I download the SupremeRAID™ drivers and manuals?

SupremeRAID™ drivers and manuals can be found here: https://docs.graidtech.com/

Where is your support matrix for NVMe drives, operating systems, and server hardware?

SupremeRAID™ supports Windows and Linux OS’s and has a driver for each. Click on either Windows or Linux at this link to see specific versions and the SSD drives we have tested: https://docs.graidtech.com/

How can I get post-sales customer support?

Please sign up for post-sales support in this webpage’s top right-hand corner: https://support.graidtech.com/portal/en/home
Our support team will handle a ticket when it is raised; the appropriate geographic team will manage it. Once the ticket is raised you will receive an email; it is possible to add comments to the case by hitting “reply all” on these emails.

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SupremeRAID™:從桌面到雲端,全面保護NVMe 數據資料

SupremeRAID™ 為新一代以 GPU 加速的 RAID, 消除了傳統的 RAID 瓶頸,在不消耗 CPU 週期和增加輸送瓶頸的情況下提供最大的 SSD 性能,從而實現無與倫比的靈活性、性能和價值。立即聯繫我們以瞭解更多資訊。

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