JP2000099278A5

JP2000099278A5 - How to define the configuration of an array disk device equipped with a SCSI interface

Info

Publication number: JP2000099278A5
Application number: JP1998265954A
Authority: JP
Filing date: 1998-09-21
Publication date: 2005-11-04

Description

【０００２】
【従来の技術】
論理的単位で定義した非常に多くのボリューム（論理ボリュームと称する）を有する大容量のアレイディスク装置（ディスクアレイ装置ともいう）に対し、ホストコンピュータ（ホストと略称する）からその全ボリュームにＳＣＳＩ接続すべく、装置を使用する環境や使用者の意図に応じて柔軟かつ容易に接続ポート（ＳＣＳＩデバイス）、ＳＣＳＩＩＤ、ＬＵＮ（Logical Unit Number）、対象ボリュームを選択し、論理パスを設定および変更することはできても、通常使用する論理パス（通常パス）の設定と同時に代替パス（代替論理パス）の設定を行うことは不可能であった。また、ＳＣＳＩＩＤおよびＬＵＮの決定にはＳＣＳＩ規格の知識が必要となり、これらを指定しない簡単な入力のみで論理パスの設定を行うことも不可能であった。 0002.
[Conventional technology]
SCSI connection from a host computer (abbreviated as a host ) to a large-capacity array disk device (also called a disk array device ) that has a large number of volumes (called logical volumes) defined in logical units. Therefore, the connection port (SCSI device) , SCSI ID, LUN (Logical Unit Number) , and target volume are selected flexibly and easily according to the environment in which the device is used and the intention of the user, and the logical path is set and changed. Although it was possible, it was impossible to set the alternative path (alternative logical path) at the same time as setting the normally used logical path (normal path). In addition, knowledge of the SCSI standard is required to determine the SCSI ID and LUN, and it is impossible to set the logical path only by a simple input that does not specify these.

この手段に対し、通常使用する論理パスと代替パスの同時設定を可能とする。また、少ない簡単な入力による論理パスの設定を可能とする。
（１）本発明の構成定義方法は、ホストコンピュータに接続する主制御装置（少なくともホストＩ/Ｆ制御部（接続ポートに対応する）を含む）と、複数の磁気ディスク装置を統合構成して動作するアレイディスク装置に対し、複数の磁気ディスク装置群に定義された論理ボリュームをアクセス対象として、装置を使用する環境や使用者の意図に応じて前記ホストコンピュータを接続するために、接続ポート、ＳＣＳＩＩＤ、ＬＵＮおよび前記論理ボリュームを選択し、前記ホストコンピュータから前記論理ボリュームへアクセスする経路である論理パスを設定する構成定義方法において、二重化されたアレイディスク装置に対し、二重化した片側に設定した論理パスから二重化したもう一方の側の代替接続ポートへの代替パスの設定を自動的に行うか否かを使用者に選択させることを特徴とする。
（２）また本構成定義方法は、前記（１）において、自動設定を選択した場合、二重化されたアレイディスク装置に対し、片側の接続ポートに設定した論理パスからもう一方の側にある代替の接続ポートへ代替パスを設定する際、前記ホストコンピュータの種類を識別することにより、特定の前記ホストコンピュータに対しては使用者の入力操作を必要とすることなく代替接続ポートを選択し、ＳＣＳＩＩＤを片側の論理パスのＳＣＳＩＩＤに１を加えたもの、およびＬＵＮを片側の論理パスのＬＵＮと同一のものとし、それ以外の前記ホストコンピュータに対しては、ＳＣＳＩＩＤおよびＬＵＮ共に片側の論理パスと同一のものとし、代替パスを設定することを特徴とする。
（３）また本構成定義方法は、前記（１）において、接続ポート、ＳＣＳＩＩＤ、ＬＵＮ、論理ボリュームを選択する代わりに、使用者の入力を接続ポートと接続する前記ホストコンピュータが必要とする磁気ディスクの容量のみとし、入力された容量から、論理ボリュームに定義された容量をもとに未使用の論理ボリュームの組み合わせを生成し、選択した接続ポートに設定した既存の論理パスとの重なりがないように未使用のＳＣＳＩＩＤ、ＬＵＮを昇順に検索し、使用者にＳＣＳＩＩＤおよびＬＵＮの選択をさせることなく論理パスを設定することを特徴とする。 For this means, it is possible to set a normally used logical path and an alternative path at the same time. In addition, it is possible to set a logical path with a small number of simple inputs.
(1) The configuration definition method of the present invention operates by integrating a main control device (including at least a host I / F control unit (corresponding to a connection port)) connected to a host computer and a plurality of magnetic disk devices. The connection port, SCSI, is used to connect the host computer to the array disk device to be accessed according to the environment in which the device is used and the intention of the user, with the logical volume defined in a plurality of magnetic disk device groups as the access target. In the configuration definition method in which the ID, SCSI, and the logical volume are selected and the logical path that is the route for accessing the logical volume from the host computer is set, the logic set on one side of the duplicated array disk device is duplicated. It is characterized in that the user is allowed to select whether or not to automatically set an alternative path from the path to the alternative connection port on the other side that is duplicated.
(2) Further, in the present configuration definition method, when automatic setting is selected in the above (1), for the duplicated array disk device, an alternative from the logical path set in the connection port on one side to the other side. By identifying the type of host computer when setting an alternate path to the connection port, the alternate connection port can be selected for the specific host computer without the need for user input operations, and SCSI IDs can be selected. Is the one in which 1 is added to the SCSI ID of the one-sided logical path, and the LUN is the same as the LUN of the one-sided logical path. For the other host computers, both the SCSI ID and the LUN are the one-sided logical paths. It is the same as the above, and is characterized by setting an alternative path.
(3) Further, in the present configuration definition method, instead of selecting the connection port, SCSI ID, LUN, and logical volume in the above (1), the magnetic required by the host computer that connects the user's input to the connection port. Only the capacity of the disk is used, and a combination of unused logical volumes is generated from the input capacity based on the capacity defined for the logical volume, and there is no overlap with the existing logical path set for the selected connection port. As described above, unused SCSI IDs and LUNs are searched in ascending order, and a logical path is set without asking the user to select SCSI IDs and LUNs.

図４のように１つのＳＣＳＩデバイスであるホストＩ/Ｆ制御部（ポート）２０２に対し、仮想的に（ｍ−１）個のＳＣＳＩＩＤ４０４を柔軟かつ容易に装置の使用環境や使用者の意図に応じて割り当てることにより、設定可能な論理パス数を大幅に増大することができる。これにより、図５のように１つのＳＣＳＩデバイスであるホストＩ/Ｆ制御部２０２に１つのＳＣＳＩＩＤ４０４を割り当てる場合の実質（ｍ−１）倍の論理パスの設定が可能となり、アレイディスク装置の全論理ボリュームを使い切ることができる。つまり大容量を実現できる。 As shown in FIG. 4, a virtual (m-1) SCSI ID 404 is flexibly and easily applied to the host I / F control unit (port) 202, which is one SCSI device, in the usage environment of the device and the intention of the user. The number of logical paths that can be set can be significantly increased by allocating according to. As a result, as shown in FIG. 5, it is possible to set a logical path that is substantially (m-1) times as large as when one SCSI ID 404 is assigned to the host I / F control unit 202, which is one SCSI device. All logical volumes can be used up. That is, a large capacity can be realized.

本構成定義方法により定義した論理パスおよび代替パスを用いて、ホストからは、ホスト（Ｉｎｉｔｉａｔｏｒ）とＳＣＳＩＩＤ（ＴａｒｇｅｔＩＤ）とＬＵＮの組（Ｉ-Ｔ-Ｌ）で対象ボリュームにアクセスする。アクセス対象のボリュームの決定は、接続ポートに組み込まれたマイクロプログラムにより行う。これにより、１つのＳＣＳＩデバイスである接続ポートが、Ｉ-Ｔ-ＬによりＳＣＳＩＩＤ=０を持つＳＣＳＩデバイスにもＳＣＳＩＩＤ=１を持つＳＣＳＩデバイスにもなることが可能で、最大（ｍ−１）個のＳＣＳＩデバイスのように振る舞うことができる。 Using the logical path and the alternative path defined by this configuration definition method , the host accesses the target volume with a pair (ITL) of the host (Initiator), SCSI ID (Target ID), and LUN. The volume to be accessed is determined by a microprogram embedded in the connection port. As a result, the connection port, which is one SCSI device, can be a SCSI device having a SCSI ID = 0 or a SCSI device having a SCSI ID = 1 by ITL, and can be a maximum (m-1). ) Can behave like SCSI devices.

本方法は、ＳＶＰ２０５上で実行する一プログラムを用いて実現される方法であって、図３のＦＤ３０７記憶媒体からＳＶＰ２０５へ本プログラムをローディングして実行することが可能である。 This method is a method realized by using one program executed on SVP 205, and it is possible to load and execute this program from the FD307 storage medium of FIG. 3 to SVP 205.

Claims

A main control device connected to the host computer, to the array disk system which operates by integrating configure multiple magnetic disk devices, a logical volume defined in a plurality of magnetic disk devices used as the access target, using the device to connect the host computer according to the intention of the environment and the user, connection port, SCSI ID, the logical path is a path that selects the logical volume and Contact LU N, accessed from the host computer to the logical volume in the configuration definition how to set, to duplexed array disk apparatus, whether or not automatically to set the alternate paths from the logical path set on one side, with duplication to an alternate connection port on the other side duplexed A configuration definition method characterized in that the user is allowed to select.

2. The configuration definition method according to claim 1, wherein when automatic setting is selected, an alternate path from a logical path set to one connection port to an alternate connection port on the other side for a duplexed array disk device When the host computer is set, the type of the host computer is identified to select an alternative connection port for the specific host computer without requiring a user input operation, and the SCSI ID is set to one logical path. 1 is added to the SCSI ID and the LUN is the same as the LUN of one logical path. For the other host computers , both the SCSI ID and LUN are the same as the logical path on one side. A configuration definition method characterized by setting an alternative path.

2. The configuration defining method according to claim 1, wherein instead of selecting a connection port, SCSI ID, LUN, and logical volume, a user input is limited to a capacity of a magnetic disk required by the host computer connected to the connection port. From the input capacity, a combination of unused logical volumes is generated based on the capacity defined in the logical volume, and unused so that there is no overlap with the existing logical path set for the selected connection port. A configuration defining method, wherein a SCSI ID and LUN are searched in ascending order, and a logical path is set without causing a user to select a SCSI ID and LUN.

Host I serving as a connection port connected to the host computer / An array disk device configuration definition method comprising a main control device including an F control unit, a plurality of magnetic disk devices, and a service processor for managing the configuration,
The service processor performs a process of setting a logical path that is a path for accessing the logical volume from the host computer by a user's selection input using a setting screen,
In the logical path configuration definition, the connection port is assigned to the host computer, a plurality of SCSI IDs are assigned to the connection port, a plurality of LUNs are assigned to the SCSI ID, and the logical volume is assigned to these sets. Assign
Based on the first logical path that is normally used, the user is allowed to select whether to automatically generate and set a second logical path as an alternative, and the first logical path is defined according to the selection. Generate and set the definition of the second logical path so that there is no overlap with
When automatically generating and setting the second logical path, the type of the host computer is identified, and the specific host computer is replaced without requiring the user's input operation The connection port is selected, the SCSI ID obtained by adding 1 to the SCSI ID of the first logical path, and the LUN same as the LUN of the first logical path are selected to set the second logical path. For the other host computers, select the same SCSI ID and LUN as the first logical path and set the second logical path.
When a capacity required by the host computer connected to the connection port is input, a set of unused logical volumes based on the capacity defined in the logical volume. Search for unused SCSI IDs and LUNs in ascending order so that there is no overlap with the existing logical path set for the selected connection port, and prompt the user to select a SCSI ID and LUN. A configuration definition method characterized in that the logical path is set without making it.