libnvme(9) API Manual libnvme(9)

# [NAME](#NAME)

struct nvme\_mi\_ctrl\_health\_status - Controller Health Data Structure (CHDS)

# [SYNOPSIS](#SYNOPSIS)

struct nvme\_mi\_ctrl\_health\_status {  
**\_\_le16 ctlid;**  
**\_\_le16 csts;**  
**\_\_le16 ctemp;**  
**\_\_u8 pdlu;**  
**\_\_u8 spare;**  
**\_\_u8 cwarn;**  
**\_\_u8 chscf\[2];**  
**\_\_u8 rsvd11\[5];**  
};

# [Members](#Members)

[ctlid](#ctlid)

Controller Identifier

[csts](#csts)

Controller Status

[ctemp](#ctemp)

Composite Temperature

[pdlu](#pdlu)

Percentage Used

[spare](#spare)

Available Spare

[cwarn](#cwarn)

Critical Warning

[chscf](#chscf)

Controller Health Status Changed Flags (see *enum nvme\_mi\_chscf*)

[rsvd11](#rsvd11)

Reserved

struct nvme\_mi\_ctrl\_health\_status October 2026

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Document: nvme_mi_ctrl_health_status-libnvme3(2) from nvme-cli 3.2-r0 (Chainguard OS)
Source: https://github.com/linux-nvme/nvme-cli