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Component installation guidelines
SAS/SATA drive
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The drives are hot swappable.
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As a best practice, install drives that do not contain RAID information.
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If you are using the drives to create a RAID, follow these restrictions and guidelines:
To avoid degraded RAID performance or RAID creation failures, make sure all drives in the
RAID are the same type (HDDs or SSDs) and have the same connector type (SAS or SATA).
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For efficient use of storage, use drives that have the same capacity to build a RAID. If the drives
have different capacities, the lowest capacity is used across all drives in the RAID.
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If one drive is used by several logical drives, RAID performance might be affected and
maintenance complexities will increase.
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If HDDs are frequently inserted and removed with intervals of less than 30 seconds, the HDDs
may fail to be identified by the system.
NVMe drive
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Whether or not NVMe drives support hot swapping and managed hot removal is related to the
operating system. You can query the compatibility relationship between the two through the
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As a best practice, install drives that do not contain RAID information.
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As a best practice, all NVMe drives forming a RAID have the same capacity. When the NVMe
drive capacities are different, the system regards the capacity of all NVMe drives as the
smallest capacity among them. For NVMe drives with a larger capacity, their excess capacity
cannot be used to configure the current RAID or other RAIDs.
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To hot insert NVMe drives, insert the drives steadily without pauses to prevent the operating
system from being stuck or restarted.
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Do not hot swap multiple NVMe drives at the same time. As a best practice, hot swap NVMe
drives one after another at intervals longer than 30 seconds for the operating system to identify
the installed or removed NVMe drive. If you insert multiple NVMe drives in a short period of time,
the system might fail to identify the drives
NVMe VROC module
describes the NVMe VROC modules supported by the server and their specifications.